Considerations and Limitations

In this article

    This section lists considerations and known limitations in Veeam Backup for Microsoft 365 6a.

    Note

    For the complete list of known issues and limitations in Veeam Backup for Microsoft 365 6a, see Release Notes. For limitations in Veeam Backup for Microsoft 365 functionality when protecting organizations with modern app-only authentication, see this Veeam KB article.

    Infrastructure

    • Veeam Backup for Microsoft 365 does not support encryption at-rest for the following types of backup repositories:
    • A local directory on a backup proxy server.
    • Direct Attached Storage (DAS) connected to the backup proxy server.
    • Storage Area Network (SAN).
    • Network Attached Storage (SMB shares version 3.0 or later).
    • [For Microsoft Outlook] Update channels such as Beta Channel, Current Channel, or Monthly Enterprise Channel are not supported; Veeam Backup for Microsoft 365 supports only RTM/GA versions. For more information, see this Microsoft article.
    • If the Veeam Backup for Microsoft 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.
    • If any of the machines with any of the Veeam Backup for Microsoft 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 listed has occurred on a server that acts as a backup proxy server, then such a server becomes Offline in the Veeam Backup for Microsoft 365 console. To make a server available, re-add it. For more information, see Adding Backup Proxy Servers.
    • IPv6 is not supported for Microsoft Azure China region.
    • Adding Microsoft 365 organizations using modern authentication with legacy protocols allowed is not supported for Microsoft Azure China region.
    • Adding Microsoft 365 organizations using modern app-only authentication is not supported for Microsoft Azure Germany region.
    • Microsoft Teams service is not supported for organizations in the Microsoft Azure China and Germany regions.
    • Backup of team chats using Teams Export APIs is not supported for Microsoft organizations in the Microsoft Azure China, Germany, US Government GCC and US Government GCC High regions.
    • Notifications about backup jobs completion results may not work properly for Microsoft Azure China and Germany regions.
    • If you roll back the successful automatic update of the remote Veeam Backup for Microsoft 365 Console and PowerShell components, the Veeam Backup for Microsoft 365 server will not re-update these components.
    • Installing the Veeam Backup for Microsoft 365 RESTful API Service on a host machine running Veeam Backup Proxy for Microsoft 365 Service is not supported.

    Backup Repositories

    • A symbolic link that is configured as a mapped drive is not supported.
    • Storage volumes that host backup repositories must be formatted with NTFS or ReFS.
    • You should not use 3rd party encryption software for backups in backup repositories as this may lead to unpredictable system behavior and inevitable data loss.
    • Primary Storage Hardware Systems both with and without deduplication or compression are only supported for the certified operating systems. Make sure that the operating system you use is included in the Certified for Windows Server list. For more information, see this Microsoft article.
    • Software Defined Storage Systems without deduplication or compression are only supported for the certified operating systems. Make sure that the operating system you use is included in the Certified for Windows Server list. For more information, see this Microsoft article.
    • Software Defined Storage Systems with enabled deduplication or compression are not supported.
    • Based on the format of the used Microsoft JET Database, deduplication backup storage appliances are not supported.
    • For Microsoft Windows operating system or other operating systems, the file system internal deduplication is not supported.
    • SMB shares version 3.0 are only supported when they are within the Microsoft Exchange Storage definition. For more information, see this Microsoft article.
    • If you already backed up team chats using Teams Export APIs, you must not change a backup proxy server where backups are stored to another backup proxy server for which usage of Teams Export APIs for team chats backup is not enabled yet.

    Object Storage Repositories

    Backup

    • As part of Microsoft Teams data backup, Veeam Backup for Microsoft 365 backs up only the following types of channel tabs: Website, Planner, Word, Excel, PowerPoint, Visio, PDF, Document Library, OneNote, SharePoint, Stream, Forms, Power BI, Power Automate (ex Flow) and Azure DevOps.
    • When you perform backup of Microsoft Teams data, Veeam Backup for Microsoft 365 does not back up the following objects:
    • Private channels.
    • One-on-one and group chats.

    For more information about chats in Microsoft Teams, see this Microsoft article. You can use Veeam Explorer for Microsoft Exchange to explore data from user mailboxes and view chat messages as MSG files.

    • Audio and video calls.
    • Video recordings saved to Microsoft Stream.
    • Contacts.
    • Calendar: information about meetings and meeting chats.
    • Code snippets in posts.
    • Banner notifications in posts.
    • Data of applications added as channel tabs (such as Website, Planner, Word, Excel, PowerPoint, Visio, PDF, Document Library, OneNote, SharePoint, Stream, Forms, Power BI, Power Automate and Azure DevOps) and other 3rd party applications if their data does not reside in the SharePoint document library of the team.
    • Backup of team chats using Teams Export APIs is only supported for Microsoft 365 organizations with modern app-only authentication.
    • Veeam Backup for Microsoft 365 may not backup OneNote notebooks if their size is more than 2 GB. For more information, see this Microsoft article.
    • External SharePoint lists are not supported for backup. For more information, see this Microsoft article.

    Restore

    Note

    For more information about limitations that apply when you restore data from backups using Veeam Explorers, see the following sections of the Veeam Explorers User Guide:

    For more information about enabling In-Place Hold and Litigation Hold, see this Microsoft article.

    • Restore of OneNote notebooks from backups of Microsoft SharePoint, Microsoft OneDrive for Business and Microsoft Teams data for organizations with modern app-only authentication is not supported.
    • Restore of OneNote tabs from backups of Microsoft Teams data may fail with the "Configuration size exceeded. Provided: '4117' bytes MaxAllowed: '4096' bytes" error if the OneNote tab name includes non-Latin or special characters.
    • If a SharePoint site includes a hidden list, such list is not displayed in Veeam Explorer for Microsoft SharePoint after a site backup and thus, cannot be restored.
    • Before restoring team data using Veeam Explorer for Microsoft Teams or team sites using Veeam Explorer for Microsoft SharePoint for a tenant organization with modern app-only authentication, make sure that a user account used for authorization has access to the root SharePoint site of this tenant organization.

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