Can't Sign In Lync 2013 Test Environment Windows Server 2012

Ensure that the Lync Server is up and running by checking the Lync services are being up. Also check the Front End service being started - see this:

http://support.microsoft.com/kb/2795828

Moreover, is the server listening correctly to TCP port 5060. Verify if the firewall is enabled that TCP port 5060 is allowed. You can also check this thread:

http://social.technet.microsoft.com/Forums/lync/en-US/e2514c4e-1961-42cb-8017-91602413b225/lync-server-not-listening-on-port-5060?forum=ocsvoice

I would recommend uninstalling or disabling any web filtering or web protection (pop up blocker, internet security software's \ programs and then try logging in.

http://techspeeder.com/2013/10/01/cant-sign-in-to-lync-2013-the-server-is-temporarily-unavailable/

http://community.office365.com/en-us/forums/166/t/153663.aspx?PageIndex=2

Mahesh

Heyas,

Neither of those worked. Any other tips are there are logs I can consult.

Thank you.

Heyas,

An interesting thing I have found when a perform a NSLookup on the SIP domain the result I get is failure of the lookup.  See attached screenshot.

Can you provide clarification?

Thank you
Lync-Signin-2.png

My final query is that there anyway I have identified this quickly using the Lync logs or some sort of troubleshooter.

Thank you.

Thank you for help and clarification.