After configuring Ad Sites Exchange gives error on owa

Posted on 2011-04-26
Last Modified: 2012-05-11

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.
Question by:eugene20022002
    LVL 26

    Expert Comment

    Check on the internet-facing CAS server application logs
    That will clearly indicate if there is any auth. mismatch\differences
    LVL 7

    Accepted Solution

    I sorted it out yesterday.
     Basically I read up about configuring the non internet facing cas servers as proxies.
    did that for the owa and ecp.
    What I forgot to do though was changed the authentication type to intergrated. After an iisreset /noforce all was well after about 10min. for some reason it didnt work immediatly , but after a few mins it was fine.

    LVL 7

    Author Comment

    LVL 7

    Author Closing Comment

    resolved the issue myself by reading up on technet .

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