
490 Chapter 13: Unity with Microsoft Exchange
Figure 13-16 shows an Exchange 5.5 site that has been joined by Exchange 2000/2003. The
Exchange 2000/2003 site replication server is the first Exchange 2000/2003 server that
joins the Exchange 5.5 site. It does this through the MS ADC. The ADC is installed on a
Windows 2000/2003 server, typically a Global Catalog server. Then, connection agree-
ments are established between Exchange 5.5 and Active Directory for directory synchroni-
zation. The order of installation is Exchange 5.5, Windows 2000/2003 domain, MS ADC,
connection agreements, and the Exchange 2000/2003 Site Replication server. Then you end ...