Hello, After installing SP3 ru7 I am getting an error saying the internet facing CAS server is running an older version of exchange than my local cas server. I have 7 exchange servers - one based in each location (HT,CAS,MB) with a seperate one running just the CAS role. This CAS only server is my internnet facing server which then proxys requests to each regional server. I had upgraded this first and then started on the regional servers, after which the OWA service is not available. Can anyone advise what the problem could be? Thanks, Ronan

hi, >>>After installing SP3 ru7 I am getting an error saying the internet facing CAS server is running an older version of exchange than my local cas server. Where or when you get the error? If you can, please explain in detail. >>>I had upgraded this first and then started on the regional servers, after which the OWA service is not available. When you access your owa, if you are fail,what's error do you get? thanks, CastinLu TechNet Community Support

Start with comparing the versionnumber on the internet cas vs backend cas using adsiedit. adsiedit, services, ms exchange, first org, admin groups, exchange admin group, servers. James Chong MCITP | EA | EMA; MCSE | M+, S+ Security+, Project+, ITIL msexchangetips.blogspot.com

Start with comparing the versionnumber on the internet cas vs backend cas using adsiedit. adsiedit, services, ms exchange, first org, admin groups, exchange admin group, servers. James Chong MCITP | EA | EMA; MCSE | M+, S+ Security+, Project+, ITIL msexchangetips.blogspot.com

Hi You can check and validate the exchange version as james mentioned or by running the below script to know the rollup installed version and build number or check the below URL see if that helps To check the update Rollup http://www.bhargavs.com/index.php/2009/12/14/how-do-i-check-update-rollup-version-on-exchange-20xx-server/ OWA service not Available. http://social.technet.microsoft.com/Forums/en-US/exchangesoftwareupdate/thread/8481eb3d-a6ab-42fc-b7ea-fa9a9a625e48 Thanks

Hi You can check and validate the exchange version as james mentioned or by running the below script to know the rollup installed version and build number or check the below URL see if that helps To check the update Rollup http://www.bhargavs.com/index.php/2009/12/14/how-do-i-check-update-rollup-version-on-exchange-20xx-server/ OWA service not Available. http://social.technet.microsoft.com/Forums/en-US/exchangesoftwareupdate/thread/8481eb3d-a6ab-42fc-b7ea-fa9a9a625e48 Thanks

hi, Any update? thanks,CastinLu TechNet Community Support