how to configure exchange 2003 front end server to serve multiple exchange 2003 back end server on different exchange administrative group and child domain

Hi,

I have deployed and configured exchange 2003 front end server to serve an OWA for all exchange back end server from internet, all the exchange back end servers are on same exchange org and AD forest but different site, exchange administrative group and child domain.

Any special configurations to ensure i can access all users mailbox through OWA from front end server? Currently i'm only can access users mailbox from same exchange administrative group and child domain with front end server through exchange front end server OWA.
nasrunAsked:
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NpatangCommented:
There is no special configuration you have to make on the FE server. By default Fe server itself is capable enough to look in the AD and can ccess the MNX server.
But for your more understanding there is FE-BE guide have a look on that

http://technet.microsoft.com/en-us/library/aa996980(EXCHG.65).aspx
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ArisglobalCommented:
whats the error you are getting when trying to access the users on the different group or Child Domain?
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nasrunAuthor Commented:
Error: HTTP/1.1 503 Service Unavailable

Currently got a few back end still could not access.

Thanks for asking bro.
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NpatangCommented:
See the below mentioned artilces.
How to troubleshoot the "503 Service Unavailable" error message in Outlook Web Access in Exchange Server 2003

http://support.microsoft.com/kb/823159
http://support.microsoft.com/kb/305030
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