An error that has been discussed number of times in various forums, as some of the articles which explains how to deploy a Lync Server doesn’t mention an important step.
You get the error below while trying to sign in to the Lync 2010 client.
“Cannot sign in because the server is temporarily unavailable. If the problem continues, please contact your support team.”
An SRV record needs to be in the internal DNS for users to be able to successfully login to the Lync client. This step is missing in some of the articles out there which explains how to deploy a Lync Server.
Add an “SRV” record in the internal DNS for your SIP domain.
- Service : _sipinternaltls
- Protocol : _tcp
- Port : 5061
- Host : Lync Server FQDN
Once the record is in place, clear the DNS cache and you will be able to login successfully.