Office 365 and on-premises Exchange offer some native means of protection against losing valuable data. To prevent the permanent deletion of mailbox data and to be able to restore a mailbox when it is deleted from the Recycle Bin, it is strongly recommend that you use Office 365 retention policy or Litigation Hold (for hybrid configuration).
Retention policies do two basic things: they either protect data from deletion or delete unnecessary items.
You can create and manage retention policies on the:
As an alternative to retention policies, you can place a mailbox on Litigation Hold to preserve all mailbox content, including deleted items and original versions of modified items.
Quest On Demand provides permission-based roles to determine what permission level a user has and what tasks the user can perform.
For more details, see Adding users to an organization section in the On Demand Global Settings User Guide.
Note: On Demand administrators have full access to global settings and all module permissions.