Sunday, 11 March 2012
Lync 2010 and Federation
We recently got Lync 2010 in-house and started looking to see what can be done to federate with some of the people we work and co-operate with.
To check if you can federate with someone, they need to have a DNS record on
While there are other requirements, the easiest to check is the DNS Service record named _sipfederationtls._tcp.domain.
This should point to a valid DNS A record to an Access Edge server formatted
access_edge_servername.domain and point to port 5061.
To see what it looks like here is Microsoft's record, open a command prompt and use the command
nslookup -q=srv _sipfederationtls._tcp.microsoft.com
To federate with Office 365 I tried using the Control Panel but it would not accept the information, so I ended up using a powershell command to add federation will all of Office 365
New-CSHostingProvider –identity LyncOnline –ProxyFqdn sipfed.online.lync.com –Enabled $True
I'm still looking into why this is not displayed in the Lync Control Panel!