Access a Shared Mailbox from Outlook Desktop

Access a Shared Mailbox from Outlook Desktop

1. Click on File on the top-left corner
   
2. Select Add account
   
3. Enter the address of the shared mailbox you are trying to access
   
4. Select Sign in with another account
   
5. Remove the info already in the username box and then enter your own credentials. Continue through the auth flow here.
   
6. After the mailbox is successfully added, you can close Outlook and open it back up to load the new items.

This is done to prevent issues that may arise from a feature called automapping.  Sometimes there can be issues with the shared mailbox and if automapping is set to true on the relationship you have with the mailbox, it is difficult to repair those issues.  Keeping the shared mailbox separate from your primary mailbox allows removal of these items from Outlook without affecting your primary mailbox.