Hi, I have a weird problem. We run Outlook Web Access and our employees can access their mailbox anywhere on the internet. It works fine for all the users except for 1 user that is impossible to access his mailbox from OWA. This is not a password problem. When I put the username and password, I receive the following error: HTTP 500 internal server error. I repeat, this problem occurs only for 1 user. I looked un Exchange Administrator and see nothing to solve this problem. Is it a corrupt mailbox? I ask for your help. Thank you!