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After configuring Ad Sites Exchange gives error on owa

Hi

Previously we had just the default first site will all DCs in there.
So I set up the subnets and created 3 sites and placed the DCs in there.
Mail and everything works.
However I just found out about a issue that surfaced.
When I access my owa it works when someone from another site tries they get the following error
"A server configuration change is temporarily preventing access to your account. Please close all Internet Explorer windows and try again in a few minutes. If the problem continues, contact your helpdesk."

Site 1

Server 1 - HT/MB/CAS - Outlook Anywhere - Enabled
Server 2 - HT/MB/CAS - Outlook Anywhere - Disabled
Server 3 - HT/MB/CAS - Outlook Anywhere - Disabled
Server 4 - HT/MB/CAS - Outlook Anywhere - Disabled

Site 2
Server 5 - HT/MB/CAS - Outlook Anywhere - Enabled

Site 3
Server 6 - HT/MB/CAS - Outlook Anywhere - Enabled
Server 7 - HT/MB/CAS - Outlook Anywhere - Disabled

I think I need to use proxying but to be honest Im not that good with Exchange.
Im running Exchange 2010 with AD 2008 R2

Thanks , let me know if you need any further information.

e_aravind

Check on the internet-facing CAS server application logs
That will clearly indicate if there is any auth. mismatch\differences

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eugene20022002

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eugene20022002

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http://technet.microsoft.com/en-us/library/bb310763.aspx

eugene20022002

ASKER

resolved the issue myself by reading up on technet .
http://technet.microsoft.com/en-us/library/bb310763.aspx