I have tried every guru, Google, expert out there. This is on why when creating a user account in the AD, then selecting yes to create a mail box, it does not cretae the mail box. It works on most users, and I would say 90%, but I just tried to create a mail box and have the user log on and it tells me there is no match for the name. I have refreshed the recipient update service, rebuilt it and when I go into the recipient policy, ther is no default SMTP or X-400 address that is in the recipient policy. This is the only problem that is keeping us from adding all users in the domain and switching from pop mail service from outside. I have looked at all the posible places this could be an issue and I am at the end. PLEASE help!!!! I the server is windows 2003 and is in mixed mode and running exchange 2003. Why do most work and 1 or 2 not? Where can I trouble shoot this? I have done all I know.