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

Right click Lync 2013 iron in systray + ctrl to check the EWS status is ok.

Thanks for the reply.  The EWS Information line does say "EWS Status OK".

Did you migrate from Lync server 2010 to Lync server 2013?

If so, please check you have create DNS record for the Lync server 2013 external web service point to the NATed public IP address of Lync Front end server.

Check whether the internal web service for distributed group works.

Check whether ABS for Lync 2013 works.

Thanks for the reply.  

We are still running on Lync Server 2010.  As I said the DG expansion works externally with the 2010 client.  DG expansion works internally on both clients.  ABS is working internally and externally on both clients.  It is just the DG expansion service externally on 2013 client that isn't working.   Everything else appears to be working as expected.

Thanks.

Hi, 

did you solved this issue?

Thanks