Log into Office 365 using Admin Credentials at http://login.microsoftonline.com
Under Admin click on Exchange on the left hand side
Under recipients click on mailboxes
Find the mailbox you would like to add or remove and double click on it
In the new window check the box for Hide from address list if you are removing it from the Global Address List or uncheck the box if you are adding it
Click Save at the bottom
MS O365 Admin - Add/Remove Mailbox From Global Address List
- Published on Sep 18, 2026
- 1 minute(s) read