**You must be the owner of the shared email account to manage the account from the Outlook desktop application.  Those with access to shared email accounts who wish to manage them using the Outlook Webb App can do so using these alternate instructions: How to Manage or Add a Shared Email Account using the Microsoft 365 Outlook WebApp

In order to manage or change rules on a departmental email account you must first add the Profile to Outlook(1).  After adding the shared email profile, open outlook with the selected profile(2) and manage the account.  When finished you can remove the profile from mail preferences(3). 

  1. Add shared Profile to Outlook


   2.  Open Outlook to Edit Rules and Manage Account

Or Choose Automatic Replies to turn on out of office replies


    3.  Remove the Profile from Outlook and return original profile as default