get it here
The Update Server no longer requires Windows SharePoint Services
Front End, Web Components, Reverse Proxy
A file share is used instead to store image updates which are published through a virtual directory on the Web Components server and through the Firewall via the HTTP Reverse Proxy. Integration with Microsoft Software Update Services is no longer provided. See Option 4F: Updating Communicator Clients for additional detail.
QoE Server becomes Monitoring Server and includes CDR functionality that was in the Archiving Role
Quality of Experience Monitoring Server
See Monitoring Server for additional detail.
Archiving Server no longer collects CDRs
See Option 4E: Archiving Server for additional detail.
Enterprise Edition Expanded Topology is no longer a preferred deployment scenario
Expanded Edition roles
Consolidated Edition should be deployed for Enterprise Edition Pools. The Expanded Edition configuration is no longer offered in the setup wizard.
The Consolidated Edge role is now the only supported edge topology
Multiple consolidated edge servers can be deployed behind a load balancer for scale and high availability
A publicly routable IP address is no longer needed in a site with only a single Edge Server
When multiple edge servers are deployed with a load balancer, a publicly routable IP address is still required.
Edge Server port requirements have been changed
See Appendix A: Port Requirements for additional detail.