I have had a labourious and difficult experience of getting Lync 2010 server actually working. Having got this far, I now have problems with signing in clients.
I HAVE created the stipulated SRV record, and used nslookup to ensure this is resolving correctly. However, if I try and sign-in via the Lync client, it fails with the following error message:
"Cannot sign in because the server is temporarily unavailable. If the problem continues, please contact the support team."
Another helpful response from MS - I can't find any logging to see exactly what is failing on.
If I manually set the internal and external server names in the Lync client settings (as we're actually only using this internally) to the FQDN (magic.test.ltd) of the Lync Server, then everything seems to log in fine....
My setup is just a single Standard Edition server. I want to use the Group Chat role add-on, which is installed and also won't work (the group version of the client won't sign in either), but the problem was evident before all this.
Any help would be greatly appreciated - perhaps there is an additional SRV record to the one I've created. Details of the SRV record I've created are:
Port Number: 5061
For the hell of it, I also created a legacy record as mentioned on one site, with SRV record _sipinternal on port 5060, with all the same host details, etc.
I really hope someone can help as this is driving me mad - thoughts greatly appreciated.