4. Stabilize Your Windows Infrastructure
A stable and resilient Windows infrastructure is a crucial element of any Exchange cluster deployment. For an Exchange 2003 cluster, all Active Directory (AD) domain controllers (DCs) and Global Catalog (GC) servers must run Windows 2003 or Win2K SP3 or later; the DCs and GC servers that support an Exchange 2000 cluster must run Win2K or later. Exchange 2003 and Exchange 2000 store configuration information in DCs and GC servers. Each DC holds a complete copy of all the objects in the DC's domain, plus a copy of objects replicated in the forestwide Configuration naming context (NC). A GC server holds a complete copy of all objects in the GC server's domain, plus partial copies of objects from all other domains in the forest. DSAccess is the Exchange component that locates and retrieves AD information from DCs and GC servers. From DCs, DSAccess retrieves information about Exchange entities such as administrative groups, connectors, Exchange system policies, and other servers in the Exchange organization. From GC servers, DSAccess retrieves user information such as email addresses and distribution group memberships. (For more information about DSAccess, see "Exchange 2000 SP2's DSAccess Component," July 2002, http://www.winnetmag.com, InstantDoc ID 25330.) . . .
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