You can assign a user or user group to the OneDrive for Business app.
Procedure
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From the navigation pane, go to Protect > Office 365.
The Office 365 apps 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 Configuration tab, in the Security tile, click Edit.
The Security dialog box appears.
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In the Associations tab, enter the user or user group and role.
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Click Add.
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Click Save.