Emails and Attachments 
Calendars and Contacts
Shared Mailboxes
OneDrive Files* (Beta)
SharePoint Files within Document Libraries* (Beta)
Archived Mailboxes 
Shared Folders 
Public Folders 
Microsoft Teams

*For OneDrive and SharePoint Sites, we only backup files or files within Document Libraries.

Altaro Office 365 Backup does not support backing up the following items (list is not exhaustive): Conversation History, Drafts, Hidden Folders, Junk Email, Notes, Outbox, Recoverable items (permanently deleted email folders), Sync Issues, Yammer, Microsoft Booking Items, Microsoft OneNote Items, Microsoft Teams, Contact groups, Items in OneDrive Recycle Bin, SharePoint customisations.