I have a mailbox that I'm trying to make available to a few people. These users currently have their own mailboxes on the server. For the "shared" mailbox I have added the users to the permissions and made them "user" and I have given them "owner" permission from the properties as well. The only user who can log into the mailbox is me (I am the primary account). These users can access the mailbox just fine when I add it as an additional mailbox from their own Outlook account. Any thoughts?