Using your Office 365 Global Admin account, you can activate backups for Group & Teams mailboxes (shared inbox and calendar), SharePoint document library and OneNote Notebook.
The admin user must have full permission access to read, modify, view, write, search and perform other actions needed to support the backup, restore and export functions of your data to and from the Office 365 system.
In order to activate individual user backups, your Admin account must have Impersonation and be a member of the Management Group. Follow the instructions in the article Configuring Impersonation in Office 365.
Once Impersonation has been set, from the Backups screen click on “Add Backup Task”, and then click on the Office 365 Groups & Teams line. This will take you to the Office 365 Groups & Teams Backup Task Settings.
Our authorization process uses OAuth and requires a Global Admin account. Backup creation will add account used in backup to each group as a member.