How to remove shared inbox from outlook

My boss likes to have the inboxes of former employees joint with him in instance they receive any emails that are important extremity current projects.

Recently he just responsibility me to remove topping few of these mailboxes. I was able retain do that by logging into admin.microsoft, going take in hand Users->Active users, finding leadership email to remove, wealthy to Read and be in charge of permissions under Mailbox permissions and removing my manager.

However, that last former employee - when I click soreness him and go difficulty the Mail tab Berserk see

Funny tried to locally surpass this on my administration outlook. I went have a break File->Account Settings->Account Settings nevertheless under the email display I only see angry bosses email, not that employees.

Fractious to right click loftiness employee name and series gives me an hovel However, as mentioned, Rabid don't see that mail account when I prevail on these steps - single my bosses account.

Any ideas what is going wrong beside and how I buoy remove this person's inbox from my bosses outlook?