Some time ago I have installed new exchange server to new domain in my forest. Our environment consists of front end and back end that are divided in each domain. after installing new exchange back end, I tried to receive and send emails via outlook, and it succedd but when I try to login via webmail, an error message appears: HTTP/1.1 503 Service Unavailable anyone can give me directions? thanks for your time and assistance

Hi, Have you configured your front end server properly? Also check your smtp service that its working fine or not. will wait for your reply Regards. Shafaquat Ali.M.C.I.T.P Exchange 2007/2010, M.C.I.T.P Windows Server 2008, M.C.T.S OCS Server 2007 R2, URL: http://blog.WhatDoUC.net Phone: +923008210320

Our another back end server in domain "A" is working fine via OWA. but this new back end server in domain"B", cannot login OWA as i mentioned above. i have checked the SMTP services and its started with startup type Automatic thanks for your fast repply

Hi, I think you should read this article maybe it could help you. http://support.microsoft.com/kb/823159/en-us Regards. Shafaquat Ali.M.C.I.T.P Exchange 2007/2010, M.C.I.T.P Windows Server 2008, M.C.T.S OCS Server 2007 R2, URL: http://blog.WhatDoUC.net Phone: +923008210320

Are you trying to log into OWA on the backend or the frontend? If you are trying the frontend, then try to go directly to the backend server and see if it works. Also check you IIS to see if all the virtual folders are there, you can compare it with the working server in domainA. /MartinExchange is a passion not just a collaboration software.

Are you trying to log into OWA on the backend or the frontend? If you are trying the frontend, then try to go directly to the backend server and see if it works. Also check you IIS to see if all the virtual folders are there, you can compare it with the working server in domainA. /Martin Exchange is a passion not just a collaboration software. Im tryin to log in OWA into front end server. when i log on into backend server, its working. I have compared all virtual folders setting between exchange server in domain A (which is working) and exchange server in domain B (which cannot log in into front end OWA as i mentioned above), and I found that all the setting is just ok (there is no difference. Some people in internet says that it because the service pack version between front end and back end is different. I have checked the exchange server service pack in front end and in back end, and the service pack is match. Is there anything else that i have to check thanks for the help

Hi, I think you should read this article maybe it could help you. http://support.microsoft.com/kb/823159/en-us Regards. Shafaquat Ali. M.C.I.T.P Exchange 2007/2010, M.C.I.T.P Windows Server 2008, M.C.T.S OCS Server 2007 R2, URL: http://blog.WhatDoUC.net Phone: +923008210320 I have checked that link, and I have tried to follow it, but i still cannot log in into OWA

Hi, Form-based authentication is turned of on the backend server, right? Also Windows authentication should be set as authentication method. /MartinExchange is a passion not just a collaboration software.

Hi, Form-based authentication is turned of on the backend server, right? Also Windows authentication should be set as authentication method. /Martin Exchange is a passion not just a collaboration software. Yes, the Form-based Authentication on exchange virtual server is already turned off (disabled), and the authentication methods on exchange virtual directory: basic authentication and integrated windows authentication is already checked too.

Is the Authentication set correct under the http protocol in the Exchange System Manager as well? /MartinExchange is a passion not just a collaboration software.

Is the Authentication set correct under the http protocol in the Exchange System Manager as well? /Martin Exchange is a passion not just a collaboration software. Under the http protocol (in exchange system manager), under exchange virtual directory i have checked basic authentication and integrated windows authentication as well. I also checked this link http://support.microsoft.com/kb/899385/en-us but nothing happen, still http:/1.1 503 Service Unavailable when i tried to log on OWA via front-end, with mailbox stored on my new back end server I keep on searching on net right now to find the answer is there anything else that i need to check? thanks for the help