The system is Microsoft Windows SBS 2008.
All updates are installed.
The problem started since the first day that the server is alive.
Occasionally a pop up windows appirs asking for user details.
Despite user details are insert correctly (user name and password and format [username\domain] ), the popup windows keep askinig like the details are not correct.
After some investigation, it seems like i have a problem downloading OAB from the server.
The problem appears in both outlook 2003 and outlook 2007 and appears for all the users.
Even if i go to htts://servername/OAB, i can not pass user name and password.
I belive it may be a permissins issue, but ican not find where to look for it ?
Thanks for any help.