My system consists AD, mailbox, edge, 2 hub ( install hub transport and client access. We are config network loadbalcing). In local hub02, I can check logon email by owa, pop. In local Hub 01, I can not logon email by owa but I can get email by POP3. Error appears In local hub 01: When I logon email by owa ,it not log on to email by owa. After time, It appear " HTTP Error 503. The service is unavailable" Please help me

Hi, As I M just sharing my experience maybe it could help you. The Problem was caused by missing dll's in the inetsrv folder which caused the DefaultAppPool to fail. Replaced DLL's and then deleted and recreated the Exchange 2007 OWA folder by running New-OWAVirtualDirectory -Name owa 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, Phone: +923008210320

Hi Ali How I can Replaced DLL's ?

Hi, From the media of your Exchange Server. 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, Phone: +923008210320

Hi Ali, I search from your exchange server 2007 but I can not found it. Can I copy inetsrv folder from hub02 ?

Hi, Try the following steps to troubleshoot the problem: Step 1 Create a new OWA virtual directory ============================= 1. On the hub01, Open exchange management shell, type: Remove-OwaVirtualDirectory -identity "owa (default web site)" 2. Then create a new OWA: New-OwaVirtualDirectory 3. Open Run, type iisreset to restart IIS related services. Step 2: Recycle Application pools ========================== 1. Open IIS, Expand to Application Pools, 2. Recycle all the Application pools such as DefaultAppPool, exchangeApplicationPool.Please 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. Thanks