Microsoft Lync Server has a number of different server roles. These can be combined different ways to produce a myriad of architectural options. Even the collocation of services for a given role can be split for added flexibility.
The Front End role in Lync Server is significantly changed from previous versions. Three significant architectural changes are related to the Front End Server role.
• The Office Communications Server 2007 R2 Mediation Server role is now collocated on the front end as a best practice for all architectures. The exception is a direct SIP connectivity to a PBX or a SIP trunking provider.
• The A/V Conferencing role can now be broken into a dedicated pool. This is recommended for large deployments with more than ...