Hello All, we are facing a problem while accessing OWA. If any domain user try to access the mails thru OWA, it throws an error "HTTP 500 - Internal Server Error" and same is tried by domain admins, are able to access the mails. Going thru the log, the server had restarted after it dumped. This problem started after the restart only. Checked the permissions, everything is fine. Am using, Exchange Server 5.5 with SP4.0 on Windows NT server 4.0 with SP6.0a IIS 4.0 is running on windows NT server 4.0 with SP6.0a on a different PC . Help in this regard is appreciated. Thanks Gopi