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Exchange邮箱的创建和配置
拓扑图和前面的一样如下图：　　Florence是域控制器、IP地址192.168.1.1，Berlin是Exchange服务器、IP地址192.168.1.2；IStanbul为客户机，IP地址192.168.1.3。我们现在在这俩台机子上安装Office的outlook。
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　　先在Florence放如office的光盘，如下图：4 _7 u) b/ W6 ?- |6 K
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　　写上序列号，下一步，3 c0 x) l! X/ z. c5 ]&&h. E4 y
　　自定义安装，选一下，因为我们就安装一个outlook,如下图：&&T; \6 U. Q+ r0 R* M9 e* b0 y
　　安装上就可以了，这里就不多说了。' Q% I1 o/ X& y/ L&&?' R
　　我们可以在Florence上打开管理工具中的Active Directory用户和计算机，查看一个用户的属性，可以看到ActiveDirectory的架构扩展后，用户属性中多了一些和Exchange相关的设置Exchange常规，Exchange功能，Exchange高级，电子邮件地址。3 f+ h: [) T/ o! k) }
　　我们可以用复制的方法来创建，也可以单独的创建都很简单。我们分别来说一下，先用复制的，如下图：
　　一般管理员有这个，右击复制，出现如下图：) n$ C( r" _4 V& G5 Y1 Z
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　　创建一个用户，我打了个user1，点下一步：. X% }&&B! d7 X1 h1 N7 T. G$ j
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　　打个密码，要记得要永不过期的，不然会给你带来不必要的麻烦，后如下图：
　　在创Exchange邮箱那一定要打上勾，后下一步：&&e0 y7 W8 X% M$ Y
　　完成了，也许一下出不来，等会就出来了。就这样连用户带邮箱就都有了。; E& |$ l9 u) }1 `5 @6 P3 o
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　　我们来为原有的成员建一个邮箱，步骤如下，User2没有邮箱，我们为他创建一个邮箱，在user2上右击如下图：
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　　点Exchange任务，后如下图：
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　　点中创建邮箱，后下一步：&&[3 u+ I&&L" b9 o/ @! c
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　　别名那由于我的失误弄错了，失误。那应该是user2，后下一步：
　　完成了，点完成。一下出不来，等一会就出来了。
　　出来了也可以按住shift,连选两个做邮箱。如下图：
剩下就和和user2一样了。　　建好就可以对office的outlook进行配置。先打开，如下图：# f% O6 I1 k2 b9 I+ Y3 o1 O4 X# W
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　　点下一步。如下图：8 S1 {! W&&q. S6 _* `8 B% U
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　　是后点下一步： 选Microsoft Exchange Server点下一步：
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　　Exchange服务器是Berlin上面打Berlin，不用缓存，因为我们不一定一直在啊，下面有户名写administrator后检查姓名。后点下一步：
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完成对邮箱的配置，后进入。如下图：还是个英文换成中文的，步骤如下：
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　　1.必须把outlook关掉。右击outlook图标，选择“属性”如下图：
　　2。在运行打cmd进入，再在outlook的属性里看到路径。后打上/resetfoldernames
　　执行完上面的命令后outlook会自动重启，重启后看一下是否变成中文,* ]& O# H. ~' }& U6 b# q
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　　在另一台机子上以user1登录，打开outlook和上面的配置一样。打开后如下图：4 t+ t1 O4 \% B! r# {
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　　发一条信息看成功吗？点新建发。如下图：
　　在看看user1收到了吗？
　　Ok没问题收到了。
　　创建邮箱基本就这样了。下面我们来为邮箱配置一下。打开下面的图：1 d7 J$ T/ g: c% @9 _
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　　打开后点开user的user1的属性，点Exchange常规，如下图：7 S6 I5 L4 H&&k- L) N! B
　　点开存储限制，如下图：
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　　去掉使用邮箱存储默认设置的勾，进行配置，去了后对邮箱大小进行配置。达到该限度时发出警告，是基本配置大小。在达到限度时禁止发送，这配置的是在你后面配的大小不能发送了，但可以接收。而在达到该限度时禁止发送和接收，就是不能发送和接收。
　　去掉使用邮箱存储默认设置，可以对删除的邮件进行配置。在保留已删除项目的期限，后写几天，就可以在删除邮件后，在保留几天。在完成对存储的备份之后才永久就删除项目前打钩，就是在删除前备份后才删除。3 _* \7 S" }, H1 N8 {2 l% N* R
　　下面我们来做一下删除保留的实验。如下图：
　　Florence以administrator登陆，Berlin以user1登陆，让administrator给user1发条信息，删除再恢复。如下图：选择工具菜单下的“恢复已删除的邮件”
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　　再点传递选项，出现如下图：
　　这个可以做代表发送，在添加一个用户，且权限要低一些不然就是代理发送了，在转发地址那无就是不转发，点转发到，点修改加个用户，就把邮件发的他那了，在底下将邮件同时传递到转发地址和收件人的邮箱，就可以让邮件即在收件人收到，也可以让邮件转发的人收到。下面我们来对这一项做几个小实验。如下图，加个权限低的用户。
　　建好用户后在添加那写上user6。如下图：
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　　现在把user6添加到Istanbul的管理员组，在Istanbul右击我的电脑----管理---点开本地用户和组，在用户那加个用户user6，后在组那的administrator添加user6。后以user6登陆。如下图：
　　后打开user6的邮箱，做具体实验。打开outlook，如打不开，可以在设置---控制面板---4 {9 B7 I&&w* W* l2 N& E2 x( |
　　邮件----显示配置文件，后如下图：# ?; @( O7 v6 o. o5 e
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　　删除，后就可以进入outlook了，如下图：' L8 x4 `: j+ L8 B
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　　后用user6代表user1给user2法消息。如下图：
　　写好后发送，看user2怎么样？如下图：. X% [5 y7 [5 _' K4 l0 Q; r
　　还是user1后选中转发到，点修改添加administrator，如下图：
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　　我们用user2给user1发一条信息看看。如下图：
　　再点开传递限制，如下图
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　　发送和接受邮件大小用默认就可以，太大就不用这了，不好用，太慢。邮件限制，的接收邮件低下，一般就是来自任何人。仅来自，就是就接收谁的邮件添加人就可以。来自任何人，除，就是就不接受谁的邮件，也是添加那加人。
　　好了，邮件的创建和配置就介绍到这。
|||CNW网界Exchange Online Limits | Exchange Online Service Description
Exchange Online Limits
Office 365
Applies to: Office 365 Topic Last Modified:
The limits in Microsoft Exchange Online fall into one of the following categories:
Important:
The limits applied to a Microsoft Office 365 organization may differ depending on how long the organization has been enrolled in the service. When a limit is changed in the Microsoft datacenters, it can take some time to apply the change to all existing customers.
You can't modify most of these limits, but you and your users should be aware of them.
These limits apply to both internal and external recipients.
By default, Exchange Online Protection (EOP) protects Exchange Online mailboxes. For limits that apply to EOP features in Exchange Online, see .
Address list limit
The maximum number of address lists that can be created in an Exchange Online or Exchange Server 2013 organization. This number includes the default address lists in Exchange Online, such as All Contacts and All Groups.
Offline address book limit
The maximum number of offline address books (OAB) that can be created in an Exchange Online or Exchange Server 2013 organization.
Address book policies limit
The maximum number of address book policies (ABP) that be created in an Exchange Online or Exchange Server 2013 organization.
Global address lists
The maximum number of global address lists (GAL) that be created in an Exchange Online or Exchange Server 2013 organization.
Office 365 Business Essentials
Office 365 Business Premium
Office 365 Enterprise E1
Office 365 Education E1
Office 365 Government E1
Office 365 Enterprise E3
Office 365 Education E3
Office 365 Government E3
Office 365 Enterprise E4
Office 365 Education E4
Office 365 Government E4
Office 365 Enterprise K1
Office 365 Government K1
Address list limit
Offline address book (OAB) limit
Address book policies (ABP) limit
Global address lists limit
Exchange Server 2013
Exchange Online Plan 1
Exchange Online Plan 2
Exchange Online Kiosk
Address list limit
Offline address book (OAB) limit
Address book policies (ABP) limit
Global address lists limit
The amount of mailbox storage available is determined by the mailbox type and the user’s subscription license. Administrators can reduce maximum mailbox sizes per user or globally. Note:
Using journaling, transport rules, or auto-forwarding rules to copy messages to an Exchange Online mailbox for the purposes of archiving is not permitted. A user’s archive mailbox is intended for just that user. Microsoft reserves the right to deny unlimited archiving in instances where a user’s archive mailbox is used to store archive data for other users.
Office 365 Business Essentials
Office 365 Business Premium
Office 365 Enterprise E1
Office 365 Education E1
Office 365 Government E1
Office 365 Enterprise E3
Office 365 Education E3
Office 365 Government E3
Office 365 Enterprise E4
Office 365 Education E4
Office 365 Government E4
Office 365 Enterprise K1
Office 365 Government K1
User mailboxes
Archive mailboxes9, 10
Not available6
Shared mailboxes
Not available4
Resource mailboxes
Site mailboxes7
Not available
Public folder mailboxes
Not available
1 Each subscriber receives 50 GB of total storage, which the user can divide between the primary mailbox and the personal archive. As such, the size of the personal archive can’t exceed 50 GB. 2
Each subscriber receives 50 GB of storage in the primary mailbox, plus unlimited storage in the archive mailbox. A default quota of 100 GB is set on the archive mailbox, which will generally accommodate reasonable use, including the import of one user’s historical email. In the unlikely event that a user reaches this quota, a call to Office 365 support is required. Administrators can’t increase or decrease this quota.
A user must have an Exchange Online license in order to access a shared mailbox. Shared mailboxes don’t require a separate license. However, if you want to enable In-Place Archive for a shared mailbox, you must assign an Exchange Online Plan 1 or Exchange Online Plan 2 license to the mailbox. If you want to enable In-Place Hold for a shared mailbox, you must assign an Exchange Online Plan 2 license to the mailbox. 4
Office 365 Enterprise K1 and Office 365 Government K1 users can’t access shared mailboxes. 5
Resource mailboxes don’t require a license. 6
In-Place Archive isn’t included in Exchange Online Kiosk. However, it can be purchased as an add-on through Exchange Online Archiving. For more information, please see the . 7
Site mailboxes are created and managed in SharePoint Online. For more information, see . 8
You are limited to 50 public folder mailboxes, and the maximum total size of all public folder mailboxes is 2.5 TB. 9
In-Place Archive can only be used to archive mail for a single user or entity for which a license has been applied. Using an In-Place Archive as a means to store mail from multiple users or entities is prohibited. For example, IT administrators can’t create shared mailboxes and have users copy (through the Cc or Bcc field, or through a transport rule) a shared mailbox for the explicit purpose of archiving.
If you have created a retention policy in Exchange Online, messages will be automatically moved to a user’s archive mailbox only if the user’s primary mailbox is larger than 10 MB. The retention policy will not run automatically for mailboxes that are smaller than 10 MB.
Exchange Server 2013
Exchange Online Plan 1
Exchange Online Plan 2
Exchange Online Kiosk
User mailboxes
Archive mailboxes10, 11
Not available6
Shared mailboxes
Not available7
Resource mailboxes
Public folder mailboxes
Not available
This is the default mailbox size for Exchange Server 2013 organizations. Administrators can change this value for their organization. There isn’t a maximum storage limit for on-premises mailboxes.
Each subscriber receives 50 GB of total storage, which the user can divide between the primary mailbox and the personal archive. As such, the size of the personal archive can’t exceed 50 GB. 3
Each subscriber receives 50 GB of storage in the primary mailbox, plus unlimited storage in the archive mailbox. A default quota of 100 GB is set on the archive mailbox, which will generally accommodate reasonable use, including the import of one user’s historical email. In the unlikely event that a user reaches this quota, a call to Office 365 support is required. Administrators can’t increase or decrease this quota. 4
A user must have an Exchange Online license in order to access a shared mailbox. Shared mailboxes don’t require a separate license. However, if you want to enable In-Place Archive for a shared mailbox, you must assign an Exchange Online Plan 1 or Exchange Online Plan 2 license to the mailbox. If you want to enable In-Place Hold for a shared mailbox, you must assign an Exchange Online Plan 2 license to the mailbox. After a license is assigned to a shared mailbox, the mailbox size will increase to that of the licensed plan. 5
Resource mailboxes don’t require a license. 6
In-Place Archive isn’t included in Exchange Online Kiosk. However, it can be purchased as an add-on through Exchange Online Archiving. For more information, please see the . 7
Exchange Online Kiosk users can’t access shared mailboxes. 8
This is the default mailbox size for Microsoft Exchange Server 2013 organizations. Administrators can change this value for their organization. You are limited to 100 public folder mailboxes, and the maximum total size of all public folder mailboxes is 10 TB. 9
You are limited to 50 public folder mailboxes, and the maximum total size of all public folder mailboxes is 2.5 TB. 10
In-Place Archive can only be used to archive mail for a single user or entity for which a license has been applied. Using an In-Place Archive as a means to store mail from multiple users or entities is prohibited. For example, IT administrators can’t create shared mailboxes and have users copy (through the Cc or Bcc field, or through a transport rule) a shared mailbox for the explicit purpose of archiving. 11
If you have created a retention policy in Exchange Online, messages will be automatically moved to a user’s archive mailbox only if the user’s primary mailbox is larger than 10 MB. The retention policy will not run automatically for mailboxes that are smaller than 10 MB.
Exchange Online provides three kinds of notifications when a user’s mailbox is nearing, or at, capacity:
The user receives an email warning that the mailbox is approaching the maximum size limit. This warning is intended to encourage users to delete unwanted mail.
Prohibit Send
The user receives a prohibit-send notification email when the mailbox size limit is reached. The user cannot send new messages until enough email is deleted to bring the mailbox below the size limit.
Prohibit Send/Receive
Exchange Online rejects any incoming mail when the mailbox size limit is reached, and sends a non-delivery report (NDR) to the sender. The sender has the option to try resending the mail later. To receive messages again, the user must delete email until the mailbox is below the size limit.
Office 365 Business Essentials
Office 365 Business Premium
Office 365 Enterprise E1
Office 365 Education E1
Office 365 Government E1
Office 365 Enterprise E3
Office 365 Education E3
Office 365 Government E3
Office 365 Enterprise E4
Office 365 Education E4
Office 365 Government E4
Office 365 Enterprise K1
Office 365 Government K1
Prohibit Send
Prohibit Send/Receive
Exchange Server 2013
Exchange Online Plan 1
Exchange Online Plan 2
Exchange Online Kiosk
Prohibit Send
Prohibit Send/Receive
1 This is the default value for Exchange Server 2013 organizations. Administrators can change this value for their organization.
These limits are intended to limit mailboxes to known dimensions that can be supported in Exchange Online. The goal of these limits is to prevent an infinite number of mailbox items per folder, an infinite number of folders per mailbox, or an infinite number of public folders per Exchange Online organization. For practical purposes, mailbox folder limits are in effect unlimited and sufficient to support most Exchange Online mailboxes and on-premises mailboxes that are migrated to Exchange Online.
Maximum number of messages per mailbox folder
Specifies the maximum number of messages for a mailbox folder. New messages can’t be delivered or saved to a folder when this limit is reached.
Warning for number of messages per mailbox folder
Specifies the number of messages that a mailbox folder can hold before Exchange Online sends a warning message to the mailbox owner. When this quota is reached, warning messages are sent once a day.
Maximum number of messages per folder in the Recoverable Items folder
Specifies the maximum number of messages that can be contained in each folder in the Recoverable Items folder. When a folder exceeds this limit, it can’t store new messages. For example, if the Deletions folder in the Recoverable Items folder has exceeded the message count limit and the mailbox owner attempts to permanently delete items from their mailbox, the deletion will fail.
Warning for number of messages per folder in the Recoverable Items folder
Specifies the number of messages that each folder in the Recoverable Items folder can hold before Exchange Online logs an event to the application event log.
Maximum number of subfolders per mailbox folder
Specifies the maximum number of subfolders that can be created in a mailbox folder. The mailbox owner won’t be able to create a new subfolder when this limit is reached.
Warning for number of subfolders per mailbox folder
Specifies the number of subfolders that can be created in a mailbox folder before Exchange Online sends a warning message to the mailbox owner. When this quota is reached, warning messages are sent once a day.
Maximum folder hierarchy depth
Specifies the maximum number of levels in the folder hierarchy of a mailbox. The mailbox owner won’t be able to create another level in the folder hierarchy of the mailbox folder when this limit is reached.
Warning for folder hierarchy depth
Specifies the number of levels in the folder hierarchy of a mailbox folder that can be created before Exchange Online sends a warning message to the mailbox owner. When this quota is reached, warning messages are sent once a day.
Maximum number of public folders
Specifies the maximum number of public folders in the complete public folder hierarchy. When this limit is reached, existing public folders must be deleted before new public folders can be created.
Maximum number of subfolders per public folder
Specifies the maximum number of subfolders that can be created in a public folder. New subfolders can’t be created in a public folder when this limit is reached.
Warning for number of subfolders per public folder
Specifies the number of subfolders that can be created in a public folder before Exchange Online sends a warning message to the folder owner. If no owner exists, warning messages are sent to users with Owner permissions. When this quota is reached, warning messages are sent once a day.
Office 365 Business Essentials
Office 365 Business Premium
Office 365 Enterprise E1
Office 365 Education E1
Office 365 Government E1
Office 365 Enterprise E3
Office 365 Education E3
Office 365 Government E3
Office 365 Enterprise E4
Office 365 Education E4
Office 365 Government E4
Office 365 Enterprise K1
Office 365 Government K1
Maximum number of messages per mailbox folder
Warning for number of messages per mailbox folder
Maximum number of messages per folder in the Recoverable Items folder
Warning for number of messages per folder in the Recoverable Items folder
2.75 million
2.75 million
2.75 million
2.75 million
2.75 million
2.75 million
Maximum number of subfolders per mailbox folder
Warning for number of subfolders per mailbox folder
Maximum folder hierarchy depth
Warning for folder hierarchy depth
Maximum number of public folders
Not available
Maximum number of subfolders per public folder
Not available
Warning for number of subfolders per public folder
Not available
Exchange Server 2013
Exchange Online Plan 1
Exchange Online Plan 2
Exchange Online Kiosk
Maximum number of messages per mailbox folder
Warning for number of messages per mailbox folder
Maximum number of messages per folder in the Recoverable Items folder
Warning for number of messages per folder in the Recoverable Items folder
2.75 million
2.75 million
2.75 million
Maximum number of subfolders per mailbox folder
Warning for number of subfolders per mailbox folder
Maximum folder hierarchy depth
Warning for folder hierarchy depth
Maximum number of public folders
Not available
Maximum number of subfolders per public folder
Not available
Warning for number of subfolders per public folder
Not available
The following limits are applied to every email message.
Message size limit
Message size limits are necessary to prevent large messages from blocking delivery of other messages and affecting service performance for all users. These limits include attachments, and apply organization-wide to all messages (inbound, outbound, and internal). Messages larger than this limit will not be delivered, and the sender will receive a non-delivery report (NDR). Although message size limits can't be configured up, down, or on a per-user basis, administrators can create transport rules to limit the maximum size of any individual attachment. Note:
Particular email clients may have lower message size limits or may limit the size of an individual file attachment to a value that is less than the Exchange Online message size limit.
Subject length limit
The maximum number of text characters allowed in the subject line of an email message.
File attachments limit
The maximum number of file attachments allowed in an email message. Even if the total size of all the file attachments doesn't violate the message size limit, there is still a limit on how many attachments are allowed in the message. This limit is controlled by the multipart message limit.
File attachment size limit
The maximum file size of a single attachment. Note:
This is the maximum file size of a single attachment. Individual client programs, including Outlook Web App, may limit the size of attachments below this maximum. Exchange ActiveSync does not implement attachment size limits on an individual attachment basis. The total size of all attachments to an Exchange ActiveSync message must be less than the message size limit.
Multipart message limit
The maximum number of message body parts that are allowed in a MIME multipart message. This limit also controls the maximum number of file attachments that are allowed in a message.
Embedded message depth limit
The maximum number of forwarded email messages that are allowed in an email message.
Office 365 Business Essentials
Office 365 Business Premium
Office 365 Enterprise E1
Office 365 Education E1
Office 365 Government E1
Office 365 Enterprise E3
Office 365 Education E3
Office 365 Government E3
Office 365 Enterprise E4
Office 365 Education E4
Office 365 Government E4
Office 365 Enterprise K1
Office 365 Government K1
Message size limit
Message size limit - migration
Subject length limit
255 characters
255 characters
255 characters
255 characters
255 characters
255 characters
File attachments limit
250 attachments
250 attachments
250 attachments
250 attachments
250 attachments
250 attachments
File attachment size limit
Multipart message limit
Embedded message depth limit
30 embedded messages
30 embedded messages
30 embedded messages
30 embedded messages
30 embedded messages
30 embedded messages
While 25MB is the stated limit of Exchange Online Messages, an additional 10MB of space is provided as a growth allowance, due to the data overhead needed for encoding, encapsulation, compression and decompression of larger messages. Any messages over the 25MB stated limit may fail to be sent or received as a result of this limit. 2
The size of messages to be moved into Exchange Online are computed by Exchange Online. Versions of Exchange prior to Exchange Server 2013 may report a smaller item size. This limit applies to move based migrations using any supported Exchange Mailbox Replication Service. Other migration methods (Cutover, Staged, IMAP, PST) and other third party tools are limited by the general message size limit.
Exchange Server 2013
Exchange Online Plan 1
Exchange Online Plan 2
Exchange Online Kiosk
Message size limit
Message size limit - migration
Not applicable
Subject length limit
255 characters
255 characters
255 characters
255 characters
File attachments limit
1024 attachments1
250 attachments
250 attachments
250 attachments
File attachment size limit
Multipart message limit
Embedded message depth limit
30 embedded messages
30 embedded messages
30 embedded messages
30 embedded messages
This is the default limit for Exchange Server 2013 organizations. Administrators can change this value for their organization.
While 25MB is the stated limit of Exchange Online Messages, an additional 10MB of space is provided as a growth allowance, due to the data overhead needed for encoding, encapsulation, compression and decompression of larger messages. Any messages over the 25MB stated limit may fail to be sent or received as a result of this limit. 3 The size of messages to be moved into Exchange Online are computed by Exchange Online. Versions of Exchange prior to Exchange Server 2013 may report a smaller item size.
These limits are applied to messages, senders, or recipients to combat spam and mass-mailing worms or viruses. Note:
For distribution groups stored in an organization's address book, the group is counted as one recipient. For distribution groups stored in the Contacts folder of a mailbox, the members of the group are counted individually.
Recipient rate limit
To discourage the delivery of unsolicited bulk messages, Exchange Online has recipient limits that prevent users and applications from sending large volumes of email. These limits apply to all outbound and internal messages. Note:
Exchange Online customers who need to send legitimate bulk commercial email (for example, customer newsletters) should use third-party providers that specialize in these services.
Recipient limit
This is the maximum number of recipients allowed in the To:, Cc:, and Bcc: fields for a single email message. Note:
For the purposes of the recipient rate limit and the recipient limit, a distribution group that is stored in the organization's shared address book counts as one recipient. In a personal distribution list, each recipient is counted separately.
Message rate limit
Message rate limits determine how many messages a user can send within a specified period of time. This limit helps prevent overconsumption of system resources by a single sender. If a user submits messages at a rate that exceeds the limit via SMTP client submission, the messages will be rejected and the client will need to retry.
For users submitting via any other mechanism, the messages are accepted, but Exchange Online will queue them at the server and throttle the rate of delivery.
Office 365 Business Essentials
Office 365 Business Premium
Office 365 Enterprise E1
Office 365 Education E1
Office 365 Government E1
Office 365 Enterprise E3
Office 365 Education E3
Office 365 Government E3
Office 365 Enterprise E4
Office 365 Education E4
Office 365 Government E4
Office 365 Enterprise K1
Office 365 Government K1
Recipient rate limit
10,000 recipients per day
10,000 recipients per day
10,000 recipients per day
10,000 recipients per day
10,000 recipients per day
10,000 recipients per day
Recipient limit
500 recipients
500 recipients
500 recipients
500 recipients
500 recipients
500 recipients
Message rate limit (SMTP client submission only)
30 messages per minute
30 messages per minute
30 messages per minute
30 messages per minute
30 messages per minute
30 messages per minute
Exchange Server 2013
Exchange Online Plan 1
Exchange Online Plan 2
Exchange Online Kiosk
Recipient rate limit
10,000 recipients per day
10,000 recipients per day
10,000 recipients per day
Recipient limit
500 recipients1
500 recipients
500 recipients
500 recipients
This is the default limit for Exchange Server 2013 organizations. Administrators can change this value for their organization.
For reporting and message trace limits, see the “Reporting and message trace data availability and latency” section in .
These limits control the length of time that items in specific folders in the Inbox can be accessed.
Deleted Items folder retention period
The maximum number of days that items can remain in the Deleted Items folder before they’re automatically removed.
Retention period for items removed from the Deleted Items folder
The maximum numbers of days that items removed from the Deleted Items folder are retained before they’re permanently deleted.
Junk Email folder retention period
The maximum number of days that items can remain in the Junk Email folder before they’re automatically removed.
Office 365 Business Essentials
Office 365 Business Premium
Office 365 Enterprise E1
Office 365 Education E1
Office 365 Government E1
Office 365 Enterprise E3
Office 365 Education E3
Office 365 Government E3
Office 365 Enterprise E4
Office 365 Education E4
Office 365 Government E4
Office 365 Enterprise K1
Office 365 Government K1
Deleted Items folder retention period
Retention period for items removed from the Deleted Items folder
Junk Email folder retention period
This is the default limit for Exchange Online organizations. Administrators can change this value to a maximum of 30 days for mailboxes in their organization.
Exchange Server 2013
Exchange Online Plan 1
Exchange Online Plan 2
Exchange Online Kiosk
Deleted Items folder retention period
Retention period for items removed from the Deleted Items folder
Junk Email folder retention period
This is the default limit for Exchange Server 2013 organizations. Administrators can change this value for their organization.
This is the default value for Exchange Online organizations. Administrators can change this value to a maximum of 30 days for mailboxes in their organization.
These limits apply to distribution groups in your organization's shared address book.
Maximum number of distribution group members
The total recipient count is determined after distribution group expansion.
Limit sending messages to large distribution groups
Distribution groups that contain the number of members specified by this limit must have delivery management or message approval options configured. Delivery management specifies a list of senders who are allowed to send messages to the distribution group. Message approval specifies one or more moderators who must approve all messages sent to the distribution group.
Maximum message size for large distribution groups
If a message is sent to 5,000 or more recipients, the message size can't exceed this limit. If the message size exceeds the limit, the message isn't delivered, and the sender receives a non-delivery report (NDR). The total recipient count is determined after distribution group expansion.
Office 365 Business Essentials
Office 365 Business Premium
Office 365 Enterprise E1
Office 365 Education E1
Office 365 Government E1
Office 365 Enterprise E3
Office 365 Education E3
Office 365 Government E3
Office 365 Enterprise E4
Office 365 Education E4
Office 365 Government E4
Office 365 Enterprise K1
Office 365 Government K1
Maximum number of distribution group members
100,000 members
100,000 members
100,000 members
100,000 members
100,000 members
100,000 members
Limit sending messages to large distribution group
5,000 or more members
5,000 or more members
5,000 or more members
5,000 or more members
5,000 or more members
5,000 or more members
Maximum message size for large distribution groups
Exchange Server 2013
Exchange Online Plan 1
Exchange Online Plan 2
Exchange Online Kiosk
Maximum number of distribution group members
100,000 members1
100,000 members
100,000 members
100,000 members
Limit sending messages to large distribution group
5,000 or more members1
5,000 or more members
5,000 or more members
5,000 or more members
Maximum message size for large distribution groups
This is the default limit for Exchange Server 2013 organizations. Administrators can change this value for their organization.
The following list includes limits that apply to transport rules, also known as organization-wide rules, and limits that apply to Inbox rules. Inbox rules are set up by individual users and applied to messages sent and received by the individual user’s mailbox.
Maximum number of transport rules
The maximum number of rules that can exist in the organization.
Maximum size of an individual transport rule
The maximum number of characters that can be used in a single transport rule. The characters are used in the conditions, exceptions, and actions.
Character limit for all regular expressions used in all transport rules
The total number of characters used by all the regular expressions in all the transport rule conditions and exceptions in the organization. You can have a few rules that use long and complex regular expressions, or you can have many rules that use simple regular expressions.
Maximum number of recipients added to a message by all transport rules
When a message is acted on by different transport rules, only a finite number of recipients can be added to the message. After the limit is reached, any remaining recipients aren't added to the message. Also, distribution groups can't be added to a message by a transport rule.
Forwardee limit
The maximum number of recipients that can be configured for an inbox or transport rule with a redirecting action. If a rule is configured to redirect a message to more than this number of recipients, the rule won't be applied and any message that satisfies the rule condition won't be redirected to any of the recipients listed in the rule.
Number of times a message is redirected
The number of times a message will be redirected, forwarded, or replied to automatically based on Inbox rules. For example, User A has an Inbox rule that redirects messages to User B, based on the sender. User B has an Inbox rule that forwards messages to User C based on keywords in the subject line. If a message satisfies both of these conditions, the message is only sent to User B; it’s not forwarded to User C because only one redirection is allowed. In this case, the message is dropped without sending a non-delivery report (NDR) to User B indicating that the message wasn’t delivered to User C.
Office 365 Business Essentials
Office 365 Business Premium
Office 365 Enterprise E1
Office 365 Education E1
Office 365 Government E1
Office 365 Enterprise E3
Office 365 Education E3
Office 365 Government E3
Office 365 Enterprise E4
Office 365 Education E4
Office 365 Government E4
Office 365 Enterprise K1
Office 365 Government K1
Maximum number of transport rules
Maximum size of an individual transport rule
Character limit (in KB) for all regular expressions used in all transport rules
Maximum number of recipients added to a message by all transport rules
100 recipients
100 recipients
100 recipients
100 recipients
100 recipients
100 recipients
Forwardee limit
10 recipients
10 recipients
10 recipients
10 recipients
10 recipients
10 recipients
Number of times a message is redirected
1 redirection
1 redirection
1 redirection
1 redirection
1 redirection
1 redirection
Exchange Server 2013
Exchange Online Plan 1
Exchange Online Plan 2
Exchange Online Kiosk
Maximum number of transport rules
Maximum size of an individual transport rule
Character limit (in KB) for all regular expressions used in all transport rules
Maximum number of recipients added to a message by all transport rules
100 recipients
100 recipients
100 recipients
Forwardee limit
10 recipients
10 recipients
10 recipients
Number of times a message is redirected
3 redirections
1 redirection
1 redirection
1 redirection
These limits control the moderation settings that are used for message approval applied to distribution groups and transport rules.
Maximum size of the arbitration mailbox
If the arbitration mailbox exceeds this limit, messages that require moderation are returned to the sender in a non-delivery report (NDR).
Maximum number of moderators
The maximum number of moderators that you can assign to a single moderated distribution group or that can be added to a message using a single transport rule. Note that you can't specify a distribution group as a moderator.
Expiration for messages waiting for moderation
By default, a message waiting for moderation expires after two days. However, the processing of expired moderated messages runs every seven days. This means that a moderated message can expire at any time between two and nine days.
Maximum rate for expired moderation notification messages
This limit sets the maximum number of notification messages for expired moderated messages in a one-hour period. This limit is placed on each mailbox database in the datacenter. During periods of heavy usage, some senders may not receive notification messages for moderated messages that have expired. However, these notifications are still discoverable using delivery reports.
Office 365 Business Essentials
Office 365 Business Premium
Office 365 Enterprise E1
Office 365 Education E1
Office 365 Government E1
Office 365 Enterprise E3
Office 365 Education E3
Office 365 Government E3
Office 365 Enterprise E4
Office 365 Education E4
Office 365 Government E4
Office 365 Enterprise K1
Office 365 Government K1
Maximum size of the arbitration mailbox
Maximum number of moderators
10 moderators
10 moderators
10 moderators
10 moderators
10 moderators
10 moderators
Expiration for messages waiting for moderation
Maximum rate for expired moderation notification messages
300 expiration notifications per hour
300 expiration notifications per hour
300 expiration notifications per hour
300 expiration notifications per hour
300 expiration notifications per hour
300 expiration notifications per hour
Exchange Server 2013
Exchange Online Plan 1
Exchange Online Plan 2
Exchange Online Kiosk
Maximum size of the arbitration mailbox
Maximum number of moderators
10 moderators
10 moderators
10 moderators
Expiration for messages waiting for moderation
Maximum rate for expired moderation notification messages
300 expiration notifications per hour
300 expiration notifications per hour
300 expiration notifications per hour
300 expiration notifications per hour
This is the default limit for Exchange Server 2013 organizations. Administrators can change this value for their organization.
The following limits apply to Microsoft Exchange ActiveSync, a client protocol that synchronizes mailbox data between mobile devices and Exchange.
Exchange ActiveSync device limit
The maximum number of Exchange ActiveSync devices per mailbox.
Exchange ActiveSync device deletion limit
The maximum number of Exchange ActiveSync devices that an Exchange administrator can delete in a single month.
Exchange ActiveSync file attachment limit
The maximum size of message file attachment that can be sent or received by an Exchange ActiveSync device.
Office 365 Business Essentials
Office 365 Business Premium
Office 365 Enterprise E1
Office 365 Education E1
Office 365 Government E1
Office 365 Enterprise E3
Office 365 Education E3
Office 365 Government E3
Office 365 Enterprise E4
Office 365 Education E4
Office 365 Government E4
Office 365 Enterprise K1
Office 365 Government K1
Exchange ActiveSync device limit
Exchange ActiveSync device deletion limit
Exchange ActiveSync file attachment limit
Exchange Server 2013
Exchange Online Plan 1
Exchange Online Plan 2
Exchange Online Kiosk
Exchange ActiveSync device limit
Exchange ActiveSync device deletion limit
Exchange ActiveSync file attachment limit
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