5. Identify the location of each server (which might require asking someone in the
organization, checking what IP subnet the server is on, or physically looking for the
server) as well as note which domain the server(s) resides in. This information will help
you map out your plan to make sure you migrate all existing servers in the right order.
Identifying Existing LCS 2005 Server Roles
Once you have a list of the LCS 2005 servers, create a table listing their server roles. This
will help you group the servers into logical blocks of systems so that you can migrate them
336 Chapter 11 ??? Upgrading to Offi ce Communications Server 2007
from LCS 2005 to OCS 2007 in the proper sequence. OCS 2007 adds new server roles to
account for its new functionality, such as Web conferencing and VoIP telephony. However,
for IM or presence, or for Public IM Connectivity (PIC), those servers can be mapped one
for one between LCS 2005 and OCS 2007, and will likely identify the migration grouping
you will use to migrate servers from LCS 2005 to OCS 2007.
Table 11.1 lists the server roles in LCS 2005 and OCS 2007. A couple of the server roles
have changed in name or function, and new servers have been added to OCS 2007 and will
be referenced accordingly through the balance of this chapter.
Table 11.1 Server Roles in LCS 2005 and OCS 2007
Server Role LCS 2005 SP1 OCS 2007
Perimeter server Called access proxy Called edge server
Director X X
Front-end server X X
Archiving server X X
Communicator Web access X X
Standard Edition front-end server X X
Enterprise pool front-end server X X
Address Book server X No longer a separate role
Web conferencing server X (can be colocated on
the front-end server)
IM conferencing server X (can be colocated on
the front-end server)
Audio-video conferencing server X (can be colocated on
the front-end server)
Mediation server X
Quality of Experience
Management server
X
Mapping the Path
of Communications between LCS 2005 Servers
With the physical LCS 2005 servers identifi ed and their roles documented, the next step is
to confi rm the communications path for both incoming and outgoing communications
between the LCS 2005 servers.
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