Yes, you can backup and restore Microsoft Teams data with Veeam. When data is posted and shared within Microsoft Teams, it is journaled into Exchange Online and SharePoint Online. You can use Veeam Explorers™ to find and restore Teams data, including chats, documents and sites. You can also restore data attached to Teams tabs and channels and then manually reattach it to the corresponding Teams location.
Veeam also supports Office 365 group mailboxes and OneNote notebooks in addition to Exchange, SharePoint and OneDrive for Business objects.