Hello; I have somewhat an autodiscover issue, externally. It doesn't appear, that it works externally. I think it quit, when I added a CASArray. Not quite sure though. SRV, Firewall all seem good. If I do a https://www.testexchangeconnectivity.com/ , I get the below error (TestExchangeConnectivity): I test my TMG Firewall Policy, and it test fine shown below (TMG) I do notice, when I do a Get-AutodiscoverVirtualDirectory, I don't have a Internal or External URL. and I have it redirected to owa.domain.com\owa Thank you TestExchangeConnectivity TMG

Open a browser from outside the network and go to https://autodiscover.domain.com/autodiscover/autodiscover.xml what happens? I would expect you to get some access denied. Than you need to look at your TMG logs to see what rule blocked it.James Chong MCITP | EA | EMA; MCSE | M+, S+ Security+, Project+, ITIL msexchangetips.blogspot.com

yea, it's the "Default Rule", but not sure why...

Can you confirm on TMG exchange webservices rule that you added the autodiscover directory? http://clintboessen.blogspot.com/2010/10/autodiscover-issue-with-isa2006-or.htmlJames Chong MCITP | EA | EMA; MCSE | M+, S+ Security+, Project+, ITIL msexchangetips.blogspot.com

thank you, this worked. however, my Lync prompt me for Creds. I will post there. thank you again. Autodiscover works internally and externally