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MS O365 Admin - Add/Remove Mailbox From Global Address List


  1. Log into Office 365 using Admin Credentials at
  2. Under Admin click on Exchange on the left hand side
  3. Under recipients click on mailboxes
  4. Find the mailbox you would like to add or remove and double click on it
  5. 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
  6. Click Save at the bottom