The following are best practices from this chapter:
Deploy at least one domain controller in each physical location with more than 10 users.
Use the Install from Media option to deploy remote Global Catalog servers.
Promote or demote Global Catalog servers and domain controllers during off-hours.
Use Exchange Server 2003 site consolidation concepts to reduce the total number of deployed Exchange Servers and Global Catalog servers.
Understand the role of DSAccess, DSProxy, and the Categorizer and how Global Catalog or domain controller failures can affect them.
Place at least one GC in close network proximity to any major service (such as Exchange Server 2003) that requires use of the Global Catalog (3268) port.
Ensure that at least one domain is in Windows 2003 Native mode or Windows Server 2003 functional modes before migrating to Exchange Server 2003.
Do not use substandard or workstation hardware for Global Catalog servers, because failures can affect Outlook clients .
Use Outlook 2002 or 2003 clients when possible to reduce the threat of client lockup in the event of GC failure.
Use universal group caching for domain controllers in sites without local Exchange servers.
