Click Start, Run and type regedit then click ok. Go to HKCU\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles The profile could be the "User ID" or "Default Profile" Find the Key with the data of the user name as it appears in the Outlook directory ..i.e. (Lastname, First M.) The Key is 001e3001 There are several keys by this name in the profile but only two with the username as a value. In these two values change the data to read as this example demonstrates. mailbox - Lastname, First M. Do not modify the name. Just add the "mailbox - " part to it. The spaces and the dash must be present. This is an Exchange server problem and usually only occurs with users with last names that start with the letter R or after.
