Obtain PKI certificates for the new servers and for the reverse
proxy and new Edge Servers. You will need certificates for each
computer running Office Communications Server 2007 R2. Certificates
can be issued from an internal certificate authority (CA), or you
can obtain the required certificates from a publicly trusted CA.
Subject Alternate Name (SAN) certificates will be needed for some
server roles and network interfaces. If you are planning on a
single edge version after you transfer your users to Office
Communications Server 2007 R2, then you may be able to reuse the
existing certificates on the edge servers and proxy server. For
details about certificate requirements, see
If you intend to allow users who are homed on the Office
Communications Server 2007 R2 pool to have external or remote
access, you will need to prepare a complete set of security
certificates to support Office Communications Server 2007 R2, Edge
Server. For details, see