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TMG 2010 asks for credentials twice in OWA

Posted on 2013-12-10
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Last Modified: 2013-12-15
Hi all!

I have replaced the old TMG 2010 server with a new one, and now Activesync doesn't work and OWA asks for credentials twice before letting me in.

I have checked that there is only basic and windows integrated authentication on the Exchange server, and forms based on the TMG.

There were some trouble with the certificates, and I had to re-key them, this is maybe some of the problem...

Thanks!
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Question by:Sekodata
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by:Dirk Mare
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What does test exchange connectivity tell you?

https://testconnectivity.microsoft.com/

DirkMare
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by:Sekodata
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Yes, get an error here. But I have tested some more and I see that it works for another domain that is configured on the same TMG and the same Exchange server. The only difference is the certificate. It seems that there is a connection problem/trust between the two servers regarding the new certificate
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by:Dirk Mare
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Did you move all the certificates to the new box from the old one.

It could also be something with the certificate. "Test outlook connectivity" should tell you more.

DirkMare
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Sekodata earned 0 total points
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I found the culprit. The certificates were ok, but the reason why the users were asked for credentials twice was because the "users" on the exchange publishing rule were set to only "Authenticated users", instead of "All users". Therefore TMG asked for credentials first, before letting them authenticate to the Exchange server.

Thanks anyway!
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Author Closing Comment

by:Sekodata
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Resolved it myself
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