I use Profgen.exe (in Exchange 2000 Resource Kit) to connect users to their mailboxes in the logon script. This is because I have hundreds of roving users who move from machine to machine. Profgen then looks at an Outlook.prf file which you specify and can include %USERNAME% in for the mailbox name. %USERNAME% hooks up to the display name of the user in AD, which then connects it to the GUID of the mailbox. However, I have one major problem. If a user has username 'abc' and another user exists with username abcd or dabc, then Outlook always asks you whether you want mailbox abc, abcd or dabc after you have logged in and %USERNAME% is abc. Very annoying, particularly as several of our users have short usernames which are contained in other usernames - hence they get a long list of mailboxes to connect to every time they log on and open Outlook. It seems outlook won't accept that I have specified the EXACT mailbox name and insists on doing an Active Directory search for the string. If the search returns more than one mailbox name then it doesn't automatically connect but gives a choice. Anyone know of a solution? Can this AD search be prevented? Many thanks in advance for any help offered - I have a lot of frustrated users here and can't be the only one with this problem!