Technical requirements for Front End Servers, instant messaging, and presence in Lync Server 2013
Topic Last Modified: 2012-09-18
Instant messaging (IM) and presence always run on Enterprise Edition Front End pools and Standard Edition servers. For information on supported hardware, operating systems, and database software, see the following:
The Front End Server role can be collocated with Mediation Server. You can also run Monitoring and Archiving on Front End Servers. Front End Server cannot be collocated with Edge Server or Director.