Not sure if this is Exchange or Outlook related. I have Office 2007 SP2 and my mailbox is on an Exchange 2010 SP1 server. If I give myself Manage Full Mailbox Access to another mailbox using the Exchange EMC, the mailbox itself will automatically show up in my Outlook as an additional mailbox. This only appears to happen if I grant myself access to another Exchange 2010 mailbox. It does not happen if I grant myself access to a 2007 mailbox. So, I try to get rid of it by right clicking and selecting "Close -Mailbox name". I get a popup saying I need to go to Tools, Account Settings, and remove it from there. Only problem is when I do what it says, the mailbox is not there. Only way to get rid of it is go back to the EMC and take away the Manage Full Mailbox Access right. Open and close Outlook, then it goes away. Weird behavior and annoying to. We have a lot of shared mailboxes and people are always asking to be granted the Manage Full Mailbox Access right and at some point, I am sure they would like to be able to just disconnect it on their own.