Can you have Exch Policy running on Personal Tag's set by an application without providing user with PRT Admin function?
i.e.
Folder Policy is set for 180 days retention.
Outlook Add-In assigns a PRT (to "never delete") to an email item in this folder. This is triggered by a change to Item Message Class that has been changed to "...Classified".
Exch Retention policy processes retention deleting all emails in this folder excluding the email item with PRT of "never delete"
User does not have access to EAC (PRT Admin) to modify PRT's