Facing issues with Users setup for AOR

Summary:

I want to segregate users based on Departments for Time and Labor reports but the same users when associated with Departments are restricted on the Learning side for the reports of users for those departments only. In Learning we want Admin users to have access based on business Units and not department wise. Is there a way we can resolve this as the Time Keeper needs to get reports based on their departments and Learning Admins based on the business Units and we don't want Time and Labor Admin users to keep filtering to get results based Departments.

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