The Monitoring and Archiving server roles have been removed as standalone servers in a Lync deployment. Instead, these services are now collocated on Front End Servers within a pool as a check-box option while the pool is being defined within Topology Builder. The data is still stored within a SQL server, which can be the same instance used by the Front End pool or a different instance. This reduces the number of servers an organization needs in order to deploy and manage so this is a welcome change.