The C-spot

For federation there is not much you must configure.

– Check the configuration on the lync frontend to make sure you add the domain you want to federate with in the ‘external access – federated domains’
– Create a srv record on your public dns:

_sipfederationtls._tcp.domainx.be

port: 5061

type: TCP

In some cases I noticed you should reboot your frontend and edge server in that specific order.