Update 08/06/2015 : I found another technet page explaining that the same federation route need to be set for every pool in the organization -> https://technet.microsoft.com/en-us/library/JJ204800(v=OCS.15).aspx


It is also explaining that even you set up only one federation route A/V traffic will go through each respective Edge pool, only SIP, IM will go through the Edge pool set for the federation route.


Some weeks ago, we found that our OWA(O365)-Lync(On-Prem) integration was not working completely.

Here is the status :

  • Presence -> OK
  • IM with someone in the same Lync pool -> OK
  • IM with someone in another Lync pool -> NOK

I was getting this error message :

IM OWA Error message Federation

After troubleshooting with MS, we found that the issue was the fact that we had for each front-end pool a different federation route. Each front-end pool was using it’s own Edge pool for federation and that caused the issue.

This is also wrote in the followed technet page : https://technet.microsoft.com/en-us/library/jj688121(v=ocs.15).aspx