Domain Name System (DNS) is required by Office Communications Server and Communicator Web Access. DNS is used by Office Communications Server to do the following:
- Discover internal servers or pools for server-to-server
- Allow clients to discover the Enterprise pool or Standard
Edition server used for various SIP transactions.
- Allow external servers and clients to connect to Edge Servers
or the HTTP reverse proxy for instant messaging (IM) or
For details about DNS records used by Office Communications Server, see Domain Name System (DNS) Requirementsin the Planning and Architecture documentation.