You can back up a user group or all users for OneDrive for Business.
Procedure
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From the Command Center navigation pane, go to Protect > Microsoft 365.
The Microsoft 365 Overview page appears.
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On the Apps tab, click the app.
The Overview page of the app appears.
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On the Content tab, select the user group or All users, and then click Back up.
The Backup options page appears.
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Click Submit.