To automatically discover and back up all teams, add All Teams to the Teams app.
From the navigation pane, go to Protect > Office 365.
The Office 365 apps page appears.
In the Name column, click the app to add the teams to.
The app page appears.
On the Content tab, click Add, and then click All Teams.
The Add team dialog box appears.
From the Office 365 plan list, select the plan to use for the teams, and then click Add.
What to Do Next
To discover new teams, run a backup.