Add the user groups that you want to back up to the OneDrive for Business app. All users that belong to the user groups that you add (including users that are automatically added to the user groups) are included in backups of the app.
You can add Office 365 groups and Azure dynamic AD groups. To discover and back up Active Directory groups based on geographic affinity, you can use Azure dynamic AD groups.
From the navigation pane, go to Protect > Office 365.
The Office 365 apps page appears.
In the Name column, click the app.
The app page appears.
On the Content tab, click Add, and then select Group.
The Add group dialog box appears.
From the Office 365 plan list, select the plan to use for the user group.
From the Groups list, select the groups to add.
What to Do Next
To update the number of the OneDrive for Business user groups, in the Add group dialog box, click Showing users from cache last updated on, and then click Refresh cache.