公用文件夹限制Limits for public folders

在 Exchange Server 中,公用文件夹基于邮箱体系结构,该体系结构受益于数据库可用性组 (DAG) 和其他邮箱增强功能的恢复能力。In Exchange Server, public folders are based on a mailbox architecture that benefits from the resiliency of a Database Availability Group (DAG) and other mailbox enhancements. 但是,您应考虑一些限制和性能注意事项。However, there are limits and performance considerations that you should take into account.

限制Limits

下表列出了本地部署中公用文件夹Exchange Server。The following table lists the limits for public folders in on-premises Exchange Server. 除非特别指出限制是推荐值,否则此表列出的值就是公用文件夹适用的限制。Unless the limits are specifically stated as recommended, the values listed in this table are the supported limits for public folders.

重要

要查找Exchange Online或Microsoft 365限制Office 365?Looking for Exchange Online limits for Microsoft 365 or Office 365? 请参阅 Exchange Online 限制See Exchange Online Limits.

Item 限制Limits 注释Notes
公用文件夹邮箱总数Total number of public folder mailboxes 1,0001,000 对于 Exchange Server 2016 CU2 或更高版本,限制为 1,000。1,000 is the limit for Exchange Server 2016 CU2 or later. 尽管您可以创建超过 1,000 个公用文件夹邮箱,但不受正式支持。Although you can create more than 1,000 public folder mailboxes, it is not officially supported. 请参阅 创建公用文件夹邮箱See Create a public folder mailbox.
层次结构中的公用文件夹总数Total public folders in hierarchy 1,000,0001,000,000 尽管您可以创建超过 1,000,000 个公用文件夹,但正式不支持。Although you can create more than 1,000,000 public folders, it is not officially supported. 对于不少于 100,000 个公用文件夹的任何部署,我们建议您阅读部署公用文件夹时的注意事项For any deployment of 100,000 or more public folders, we recommend reading Considerations when deploying public folders.
父文件夹下的子文件夹数Sub-folders under the parent folder 10,00010,000 尽管可以在父文件夹下创建 1,000 多个子文件夹,但不建议这样做。Although you can create more than 1,000 sub-folders under a parent folder, it is not recommended. 可以使用 Set-Mailbox cmdlet 上的 FolderHierarchyChildrenCountReceiveQuota 参数强制实施此限制。The limit can be enforced with the FolderHierarchyChildrenCountReceiveQuota parameter on the Set-Mailbox cmdlet.
文件夹深度Folder depth 300300 文件夹深度是指在公用文件夹树的一个分支中可以存在的嵌套文件夹数量级。The folder depth is the number levels of nested folders that can exist in one branch of a public folder tree. 可以使用 Set-Mailbox cmdlet 上的 FolderHierarchyDepthReceiveQuota 参数强制实施此限制。The limit can be enforced with the FolderHierarchyDepthReceiveQuota parameter on the Set-Mailbox cmdlet.
每个公用文件夹的最大邮件数Maximum messages per public folder 1 百万1 million 可以使用 Set-Mailbox cmdlet 上的 MailboxMessagesPerFolderCountRecieveQuota 参数强制实施此限制。The limit can be enforced with the MailboxMessagesPerFolderCountRecieveQuota parameter on the Set-Mailbox cmdlet.
单个公用文件夹的最大大小Maximum individual public folder size 10 GB10 GB 此限制不包括单个文件夹下的子文件夹。This limit doesn't include subfolders beneath a single folder. 请参阅 配置邮箱的存储配额See Configure storage quotas for a mailbox.
公用文件夹的邮箱大小Public folder mailbox size 100 GB100 GB 尽管公用文件夹邮箱大小可能超过 100 GB,但正式不支持。Although public folder mailbox size can exceed 100 GB, it is not officially supported. 请参阅 配置邮箱的存储配额See Configure storage quotas for a mailbox.
每个公用文件夹邮箱的用户登录数Number of user logons per public folder mailbox 2,000 个并发用户登录2,000 concurrent user logons 我们建议您配置层次结构,以便使每个公用文件夹邮箱的用户数不超过 2,000 个。例如,如果您有 20,000 个用户,则应有 10 个公用文件夹邮箱。We recommend that you configure your hierarchy so that you have no more than 2,000 users per public folder mailbox. For example, if you have 20,000 users, you should have 10 public folder mailboxes.
已移动项目的保留时间Moved item retention 推荐为 14 天14 days recommended 使用 Set-OrganizationConfig cmdlet 上的 DefaultPublicFolderMovedItemRetention 参数。Use the DefaultPublicFolderMovedItemRetention parameter on the Set-OrganizationConfig cmdlet.
期限限制Age limit 我们建议您按照用于常规邮箱的默认设置对此进行相同设置。We recommend that you set this as the same default that you use for regular mailboxes. 这些设置可以在以下级别设置:These settings can be set at the following levels:

组织级别:使用 Set-OrganizationConfig cmdlet 上的 DefaultPublicFolderAgeLimit 参数。Organizational level: Use the DefaultPublicFolderAgeLimit parameter on the Set-OrganizationConfig cmdlet.

文件夹级别:对 Set-PublicFolder cmdlet 使用 AgeLimit 参数。Folder level: Use the AgeLimit parameter on the Set-PublicFolder cmdlet.
已删除项目的保留时间Deleted item retention 我们建议您按照用于常规邮箱的默认设置对此进行相同设置。We recommend that you set this as the same default that you use for regular mailboxes. 这些设置可以在以下级别设置:These settings can be set at the following levels:

组织级别:使用 Set-OrganizationConfig cmdlet 上的 DefaultPublicFolderMovedItemRetention 参数。Organizational level: Use the DefaultPublicFolderMovedItemRetention parameter on the Set-OrganizationConfig cmdlet.

邮箱级别:对 Set-Mailbox cmdlet 使用 RetainDeletedItemsFor。Mailbox level: Use the RetainDeletedItemsFor on the Set-Mailbox cmdlet.

文件夹级别:使用 Set-PublicFolder cmdlet 上的 RetainDeleteItemsFor 参数。Folder level: Use the RetainDeleteItemsFor parameter on the Set-PublicFolder cmdlet.
从 2010 年 10 月到 2016 Exchange公用文件夹Exchange数量Maximum number of public folders that can be migrated from Exchange 2010 to Exchange 2016 500,000500,000 这是在单个迁移中可以移动到 2010 Exchange 2010 Exchange公用文件夹的最大数量。This is the maximum number of public folders you can move to Exchange from Exchange 2010 in a single migration. 尽管您可以尝试迁移超过 500,000 个文件夹,但正式不支持此迁移。Although you can attempt to migrate more than 500,000 folders, it is not officially supported. 有关迁移公用文件夹的详细信息,请参阅使用批处理迁移将公用文件夹从Exchange 2010 迁移到 Exchange 2016。For details on migrating public folders, see Use batch migration to migrate public folders from Exchange 2010 to Exchange 2016.