New setup Lync 2010 (i.e. OCS 2010). I have serious problems getting my edge system going.

Internally things work fine. Externally I am stuck. I have used the tester at https://www.testocsconnectivity.com/ and it also fails.

NOTE: I use the domain xample.com / xample.local here just as example.

Here is the setup. I have 2 internal hosts (lync.xample.local, edge.xample.local). edge.xample.com is also correctly in dns. and points to the edge.xample.local external assigned ip address (external interface).

Externally, I have the following dns entries:

• edge.xample.com
• _sip._tcp -> edge.xample.com 443
• _sipfederationtls._tcp -> edge.xample.com 5061
• _sipinternaltls._tcp -> lync.xample.local 5061
• _sip._tls -> edge.xample.com 443

My problem is that the ocs connection test always ends up trying to contact lync.xample.local (i.e. the internal address) when connecting to [email protected]. The error is:

Attempting to Resolve the host name lync.xample.local in DNS. This shows me it clearly manages to connect to SOMETHING, but it does either fall through to the _sipinternaltls._tcp entry, OR it does get that internal entry wrongly from the edge system.

• Am I missing some entries or have some wrong?