I have a Lync 2010 FE and Edge server with the web servcies being published via UAG 2010. I am testing the Lync 2013 client and the DG (distro group) expansion is failing externally. I get the error in the client "Cannot use the distribution group service becasue the service address is incorrect, although the service is available. Contact your...." Distribution group expansion works fine externally with the 2010 client. The web servcie address for DG Extneral does work via the web browser as expected. Any ideas?
Thanks