Hi I have a OWA 2003 and ONE out of 200+ users is unable to reply. When he does, he get the red X in the message window. Here comes the interesting part. It is following the user NOT the computer. If he tries to log on, on another computer the problem is still there. If another user logs on the OWA on his computer, there is no problem. What to do? Is there a way to reset a users OWA settings? It has been working so I guess it has nothing to do with hotfixes and so on. Br Steen

So, the exchange version is exchange 2003 Please try to move the problematic mailbox into another store, which can fix the logical or rule corruption on the mailbox Please reproduce the issue and then check the IIS/HTTP log files for related trace You can use the WFetch to check the HTTP communications, and compare the traces between working user and problematic user Resources: Error logging in HTTP API Use Wfetch.exe to Troubleshoot HTTP ConnectionsJames Luo TechNet Subscriber Support (http://technet.microsoft.com/en-us/subscriptions/ms788697.aspx) If you have any feedback on our support, please contact tngfb@microsoft.com