This section covers considerations and known limitations of Veeam Backup for Microsoft Office 365.
In This Section
- Microsoft Windows 2008 operating system is not supported; Windows 2008 R2 SP1 is the minimum supported version.
- Using FAT32 is not recommended due to the limited database size (4GB). Use NTFS or ReFS instead.
- For Microsoft Outlook, the preliminary releases such as Insider releases or releases provided by Monthly Channel Updates are not supported; Veeam supports only RTM/GA versions. For more information, see this Microsoft article.
- If the Veeam Backup for Microsoft Office 365 console and a management server are deployed on different machines, make sure that the management server is trusted for delegation. For more information, see this Microsoft article.
- A symbolic link configured as a mapped drive is not supported as a repository target.
- If any of the machines with any of the Veeam Backup for Microsoft Office 365 components have been renamed (or its FQDN has been changed), or any machine has been added to a different domain, then all the components become unavailable to each other. If any of the above has occurred on a server that acts as a backup proxy server, then such a server becomes Offline in the Veeam Backup for Microsoft Office 365 console. To make a server available, re-add it, as described in Adding Backup Proxy Servers.
- IPv6 is not supported for Microsoft Azure China region.
- Notifications about backup jobs completion results may not work properly for Microsoft Azure China and Germany regions.
- Backup of In-Place Hold Items is not supported for on-premises Microsoft Exchange 2013.
- When backing up a public folder, only the root hierarchy mailbox will be available.
- If you modify a retention policy tag for a folder, Veeam Backup for Microsoft Office 365 will perform full synchronization of that folder during the subsequent backup job session. For more information, see this Microsoft article.
- Restore of multiple objects is not supported for public folders.
- Сross-tenant restores in Office 365 is only possible for Exchange Online objects, not for SharePoint sites.
- To restore In-Place Hold Items or Litigation Hold Items to the original location consider the following:
- Restore of In-Place Hold Items is not supported for on-premises Microsoft Exchange Server 2013 due to EWS limitations.
- To restore In-Place Hold Items of Exchange 2016/2019 mailboxes, these mailboxes must have In-Place Hold enabled and applied at least once with the DiscoveryHolds system folder creation. Otherwise, restore of In-Place Hold Items will fail with the following error: "Failed to restore In-Place Hold Items. Restore of In-Place Hold Items into Exchange 2013 is not supported".
For more information about enabling In-Place Hold and Litigation Hold, see this Microsoft article.