Outlook 2016 – Stop Displaying Mailboxes for Other Users

As an admin occasionally you’ll give yourself permissions to a mailbox. And then you’ll remember Outlook conveniently auto-maps that mailbox for you. Easy fix.

Close Outlook. Open Powershell.
Add-MailboxPermission -Identity targetuser@foo -User youradmin@foo -AccessRights FullAccess -AutoMapping:$false

Open Outlook. Enjoy the emptiness of the side bar.

You can/should also (once the mailbox disappears from Outlook) remove the permissions completely.

Remove-MailboxPermission -Identity targetuser@foo -User youradmin@foo -AccessRights FullAccess -InheritanceType All

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