One of our user in exchange 2007 is unable to access mailbox through OWA and get 401 error. all other users are able to use OWA normally. plz. help me resolve this issue and reply at abid.ali@getzpharma.com

Abid, Can this user access emails using Outlook? Can you provide additional details about the error?

yes he can access emails using outlook and blackberry it asks user name and password and after it gives unauthorized access error no. 401 same problem faced by anoother user sometime ago and i fixed it by changing security settings of user in AD but i dint saved that page from where i got the resolution and also forgot the exact security settings i did

Hi abid.menmon, If just one user has the issue, it maybe caused by the corrupted mailbox, I would make some tests as below: 1. use isinteg to fix the mailbox database to make a test 2. move the mailbox to other database and make a test Could you please post the detail error information when you using owa access the mailbox, and then we could do more research about it. Regards! gavinPlease remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Check below link please for possible remedy.... Error 401 possible cause "'This issue occurs if the user account that you used to log on to OWA does not have an appropriate Simple Mail Transfer Protocol (SMTP) address." http://support.microsoft.com/kb/293386 ocd Oz Casey, Dedeal, Microsoft MVP - Exchange Server, MCITP (EMA), MCITP (EA), MCITP (SA) MCSE 2003 M+,S+ MCDST, Security+; ,Project+; ,Server+, ,http://smtp25.blogspot.com,(Blog) http://telnet25.wordpress.com(Blog) This posting is provided AS-IS with no warranties or guarantees and confers no rights.