Overview:
This tutorial is for adding additional mailboxes into the MacOS version of Outlook. You may need use this tutorial to add a shared functional account which you have been given permissions to access through a -fullaccess or -editor group.
Add Mailbox to Outlook in MacOS:
Step 1:
Open the Accounts... window by going to Tools.
Step 2:
In the Accounts window click on Advanced... in the lower right.
Step 3:
In the Advanced menu click on the Delegates tab.
Step 4:
Under the Delegates tab go down to the "Open these additional mailboxes:" and click on the + sign.
Step 5:
Enter the additional mailbox you wish to open and click Add when it is selected.
Step 6:
Close out of the windows by clicking OK when done.
Step 7:
Quit Outlook and restart the program.
Step 8:
Upon logging into Outlook you should have the newly added account listed below your primary account. You may have to scroll down on the left pane to see it.
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