#Outlook archiving explained archive#
#Outlook archiving explained trial#

Users can access any folder in their archive mailbox, including ones that were moved to the auto-expanded storage area. Here are some things to consider before you enable a mailbox for auto-expanding archives: Outlook on the web when the primary mailbox is in Exchange Online rather than on-premises Outlook as a part of Microsoft 365 Apps for business (previously named Office 365 Business) Outlook as a part of Microsoft 365 Apps for enterprise (previously named Office 365 ProPlus) To access messages that are stored in an auto-expanded archive, users have to use one of the following Outlook clients: Outlook requirements for accessing items in an auto-expanded archive It won't be apparent in the folder list in Outlook that the folder was moved to an auxiliary archive. In this case, the folder will retain its original name. Sometimes an entire folder may be moved to an auxiliary archive. But moving items to subfolders may not always be the case.

The following screenshots show a folder list before and after messages are moved to an auto-expanded archive.Īs previously described, Microsoft Purview moves items to subfolders (and names them using the naming convention described above) to help distribute content to an auxiliary archive. Mmm dd, yyyy h_m is the date and time that the subfolder was created by Office 365, in UTC format, based on the user's time zone and regional settings in Outlook. Yyyy is the year the messages in the folder were received. The naming convention that Microsoft 365 uses to name these subfolders is _yyyy (Created on mmm dd, yyyy h_mm), where: When viewing the archive portion of the folder list in Outlook, these subfolders are displayed under the original folder. You might need to communicate this behavior to end users after enabling their mailbox for auto-expanding archives, to help set expectations. Sometimes when a folder is moved, one or more subfolders are automatically created and items from the original folder are distributed to these folders to facilitate the moving process. Microsoft Purview determines which folders get moved when additional storage is added to the archive. To make efficient use of auto-expanding archive storage, folders may get moved. What gets moved to the additional archive storage space? Microsoft reserves the right to deny additional archiving in instances where a user's archive mailbox is used to store archive data for other users or in other cases of the inappropriate use. Using journaling, transport rules, or auto-forwarding rules to copy messages to an archive mailbox is not permitted. A user's archive mailbox is intended for just that user. Microsoft Purview automatically adds more storage space when necessary.Īuto-expanding archiving is supported only for mailboxes used for individual users (or shared mailboxes) with a growth rate that doesn't exceed 1 GB per day. It can take up to 30 days for the additional storage space to be provisioned. Extra storage space is added until it reaches a maximum size of 1.5 TB. Then, when the archive mailbox (including the Recoverable Items folder) reaches its storage quota, the archive mailbox is converted to an auto-expanding archive. If the mailbox has a hold or retention policy applied to it, the storage quota for the archive mailbox is increased to 110 GB and the archive warning quota is increased to 100 GB. An archive mailbox with 100 GB of storage space is created, and the warning quota for the archive mailbox is set to 90 GB.Īn administrator enables auto-expanding archiving for the mailbox. This process happens automatically, which means administrators don't have to request additional archive storage or manage auto-expanding archiving.Īrchiving is enabled for a user mailbox or a shared mailbox. This process continues until the user's archive reaches a size 1.5 TB. If the user runs out of this additional storage space, more storage space is automatically added to the user's archive. When an archive mailbox gets close to its storage limit, additional storage space is automatically created for the archive.

When auto-expanding archiving is enabled, Microsoft Purview periodically checks the size of the archive mailbox. How auto-expanding archiving worksĪs explained in the introduction, additional mailbox storage space is created when a user's archive mailbox is enabled.

#Outlook archiving explained trial#

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