I'm attempting to integrate Lync 2013 into Exchange 2010 however experiencing difficulties.
I followed the how to article at:
I have it setup however when I browse to the Outlook Web App interface, I get the following error:
Instant Messaging isn't available right now. The Contact List will appear when the service becomes available
I looked in the event log for both the exchange server as well as Lync but there were no errors that have appeared.
What's the best method of diganosing communication failures between Exchange and Lync?