I have a user running Windows Vista and Outlook 2007. They connect to a mailbox on an Exchange 2010 Server. A few months ago I added some additional mailboxes for the user to view, former employees of the company but recently I was asked to remove these additional mailboxes from his Outlook profile as they are no longer required however when I clicked Tools>Email Accounts, selected my Microsoft Exchange account and clicked Change, clicked More Settings and then clicked the Advanced tab, neither mailbox was listed, even though the still appear in his Folder List in Outlook.
I created a new Outlook profile, confirmed they weren't there, closed Outlook and opened it again, still not there, but when I closed Outlook and opened it again, they re-appeared. Can anybody explained why this is happening and what I can do to get rid of the additional mailboxes permanently?