Limitations
The following limitations apply to Microsoft Office 365 Groups backup sets.
General limitations:
The following functionality is not supported with Microsoft Office 365 Groups backup sets:
• Receiving notifications
• Assigning retention rules
• Migrating a backup set
• Converting a backup set
• Validating a backup set
• Changing the ownership of a backup set
• Performing an initial backup
• Restoring from disc/tape
• Copying to and restoring from a BLM Archiver
• Backing up and restoring the team site of an Office 365 Group in a Microsoft SharePoint Online portal, including the home page, site contents, and recycling bin.
Backup limitations:
The following limitations apply when backing up a Microsoft Office 365 Groups backup sets:
• Each group can contain a maximum of 5000 drive items, including folders.
• If you rename a section in OneNote Online, the section will still be recognized by the previous name during subsequent requests.
• The contents of an Office 365 Group on the Files panel in the Outlook Web App are only backed up if they belong to a supported object type.
• Some lower-level directory tree items and folders cannot be added or excluded as backup items. During the backup process, these items and folders will be added or excluded accordingly with their parent folders.
Restore limitations:
The following limitations apply when restoring a Microsoft Office 365 Groups backup sets:
• The reported size of items might differ from the actual size of items.
• Posts and events that are larger than 4 MB (including attachments) cannot be restored.
• When restoring calendar events that contain attachments, the attachments are not restored.
• Some object properties might retain their existing values even after a successful restore activity.
• You can browse through a folder structure for a specific backed up file, but cannot search for the file.
• Referenced contents (such as images) in restored objects (such as posts and pages) might not appear as the original.
• During the restore process, there might be a delay of up to 72 hours before some items appear in their respective web interfaces.
• On occasion, restored notebooks appear in the Notebooks folder of the Documents tab of the SharePoint portal rather than the OneNote Online portal.
• When restoring note pages, some HTML content and formatting might be lost. For example, page attachments, drawings, table borders, text highlighting, etc.
• When restoring conversation posts, the From field always displays the name of the user who performed the restore activity. In addition, the restored conversation posts might contain collapsed older posts.
• If you delete user accounts from an owner or member list, the associated users cannot be restored. Other entries in the owner or member list are unaffected. We recommend that you perform an on-demand backup of the affected backup sets after deleting user accounts associated with an owner or member list.