I have a bizarre problem. We are using Exchange and Outlook 2003. When a calendar meeting or appointment is created for a network user, the recipient receives the request but a bounceback is returned to the sender with the following message "The e-mail account does not exist at the organization this message was sent to. Check the e-mail address, or contact the recipient directly to find out the correct address. <*.com #5.1.1>." The e-mail account referenced in the e-mail is from a user that no longer exists on the network. I have checked the recipient's alias, mailbox rights and membership and there is no reference to the old's user name. Has anyone else had this problem?