When we use our Admin account and go to ECP and click on "Another user..." at the top right in order to open the options of a mailbox of another user, we get a new page that only shows "Tools" in the menu listing. All other menu items are gone.
Our helpdesk relies on this in order to configure users's OoO or rules when a user is suddenly absent for example. All roles are in place, the general admin account has all roles assigned, the helpdesk accounts have the following roles assigned .
| Active Directory Permissions |
| Distribution Groups |
| Mail Recipient Creation |
| Mail Recipients |
| Mailbox Import Export |
| Message Tracking |
| Migration |
| Move Mailboxes |
| Recipient Policies |
| Team Mailboxes |
User Options |
Since this suddenly stopped working I'm assuming something in the backend got screwed up.
However I have no clue where you can go start looking.
Exchange Version 15.0 (Build 995.29)
Using a DAG setup.