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TMG and Exchange 2010 CAS Hubs

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TMG and Exchange 2010 CAS Hubs - 17.Oct.2011 9:22:17 AM   


Posts: 65
Joined: 5.May2004
From: UK
Status: offline
hi there

not sure if this is the correct place to ask this question, if not could you direct me to the correct forum. Thanks

I am trying to configure OWA via TMG to our new Exchange 2010 environment. I have configured the Exchange rule as per the Microsoft TMG administrator companion book. We have two CAS hubs and I have configured the rule to connect to CAS1.

We have configured the CAS1 to proxy to CAS2 if the mailbox isn't on CAS1.

The following authentication is configured:

TMG - Listener FBA with AD, Publishing Rule: Basic
CAS1 - Basic
CAS2 - Integrated

If a mailbox is on CAS1 then I can remotely connect ok

If a mailbox is on CAS2 then I get the following error

"Error Code: 403 Forbidden.
The server denied the specified Uniform Resource Locator (URL). Contact the server administrator. (12202)"

Internally if I connect to CAS1 and the mailbox is on CAS2 it is proxied across and works okay.

I think the error is related to Integrate authentication on CAS2, but not sure how to resolve that.

Any help or advice would be appreciated.
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