x360Cloud backs up both standard user mailboxes and shared mailboxes in Microsoft 365 environments.

In some instances, you might need to convert a standard user mailbox to a shared mailbox so that more than one user can access it.  

[~from Microsoft: Convert a user mailbox to a shared mailbox ]

While a standard user mailbox requires a Microsoft license, shared mailboxes do not.

Please note that if you convert a standard user mailbox to a shared mailbox and decide to remove the license, the shared mailbox will be limited to 50GB of storage. 

Please plan and manage your shared mailbox accordingly.

Note: This is a Microsoft limitation and is not controlled by x360Cloud.