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Data Backed Up in Microsoft 365

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The following sections describe the Microsoft 365 data protected by the Barracuda Cloud-to-Cloud Backup.

On March 31, 2025, Microsoft OneNote retired app-only authentication for Microsoft Graph APIs (Microsoft Message ID MC1011142). The change was made to enhance data security. Cloud-to-Cloud Backup uses app-only authentication and the specific change from Microsoft removed the ability to create OneNote Notebooks using app-only authentication. As a result of this change, Cloud-to-Cloud Backup will no longer be able to restore OneNote Notebooks to Microsoft 365. However, OneNote Notebooks are still able to be backed up and users can now export OneNote Notebooks from Cloud-to-Cloud Backup as an alternative recovery option. If a restoration attempt is made for a OneNote Notebook, it will fail, and a warning message will be generated in the job report.

Exchange Online

Cloud-to-Cloud Backup is no longer backing up the Recoverable Items and Archive Mailbox Recoverable Items folders in Exchange Online by default for customers accounts created after April 11, 2024. This change was made for two reasons:

  • Recoverable items can grow exponentially in size, significantly increasing both the time it takes to complete Exchange backup jobs and Microsoft throttling, reducing job completeness.

  • Research has been identified that most customers do not need this data, as it is duplicated data already backed up elsewhere. For example, if a user receives an email, that email is backed up in the Inbox. If the email is deleted, it is backed up again in the Deleted Items folder. If Recoverable Items is also being backed up, the email is also backed up again in that folder. To enable these backups, contact Barracuda Networks Technical Support.

Customers with Cloud-to-Cloud Backup accounts activated prior to April 11, 2024 will continue to be able to back up the Recoverable Items and Archive Mailbox Recoverable Items folders, however Barracuda Networks recommends customers to disable these backups. To skip backing up these folders, contact Barracuda Networks Technical Support. 

Mailboxes

  • User mailboxes with a provision plan enabled that includes Exchange with the account enabled in Microsoft 365.

  • Shared mailboxes with an account enabled in Microsoft 365.

Supported Data Types

  • Folders

  • Emails

  • Calendar

  • Tasks

  • Contacts

  • Notes

  • Archive Mailboxes (In-Place Archiving)

  • Recoverable Items store

Known Issues

  • Some mailboxes with an error on their provisioned plan setting in Microsoft 365 will not be backed up by Barracuda Cloud-to-Cloud. 

*Note that OneNote Notebooks can only be exported and cannot be restored.

OneDrive for Business

Users

  • Any enabled user account, not set as a guest user, that has a SharePoint provisioned plan enabled.

Supported Data Types

  • Files

  • Folders

  • OneNote files

Known Issues

  • Some users with an error on their provisioned plan setting in Microsoft 365 will not be backed up by Barracuda Cloud-to-Cloud.

Note: Backing up shared files and folders using the Add shortcut to OneDrive feature in SharePoint is currently not yet supported.

*Note that OneNote Notebooks can only be exported and cannot be restored.

SharePoint Online

Sites

  • All root level site collections

Supported Data Types

  • OneNote files

  • Root site collections

  • Subsites

  • Lists, excluding hidden SharePoint lists

  • Document libraries

  • Site pages

  • Site permissions

  • List permissions

*Note that if a SharePoint Site is created using a Teams Template or through the creation of a Group, the data will show up under Teams and not SharePoint.

*Note that OneNote Notebooks can only be exported and cannot be restored.

Teams

Teams

  • All groups of type unified

  • All groups with an associated Team (resourceProvisioningOptions set to Team)

Supported Data Types

  • OneNote files

  • Groups/Teams

  • Groups/Teams owners and members

  • Teams sites

  • Teams mailboxes

  • Teams files and folders

  • Teams public and private channels

  • Teams tabs pointing to Microsoft 365 native resources

*Note that if a SharePoint Site is created using a Teams Template or through the creation of a Group, the data will show up under Teams and not SharePoint.

*Note that OneNote Notebooks can only be exported and cannot be restored.