Article ID: 875427 - View products that this article applies to.
This article discusses the ratio of global catalog servers to Microsoft Exchange Server 2003 computers or to Microsoft Exchange 2000 Server computers in your Exchange organization. Additionally, this article describes some of the issues that you should consider when you run Exchange Server on a domain controller.
Global catalog server ratio and global catalog server placementThe ratio of servers to global catalog servers in your Exchange organization depends on all the following:
A general guideline is to deploy one global catalog server for every four Exchange computer processors. Therefore, by using this general guideline, you might deploy your global catalog servers as follows.
Note This general guideline assumes that all the computer processors are of the same type and of the same speed.
Exchange Server computer placementFor performance and for scalability, we recommend that you install Exchange 2000 Server or Exchange Server 2003 on a member server instead of on a domain controller. However, sometimes you may have to install Exchange on a domain controller. Consider all the following if you install Exchange on a domain controller:
For more information, click the following article numbers to view the articles in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/322801/ )Exchange System Attendant does not start, and you receive a "Global catalog servers not responding" error message
(http://support.microsoft.com/kb/829361/ )Exchange Server 2003 computer takes longer than you expect to shut down
(http://support.microsoft.com/kb/313994/ )How to create or move a global catalog in Windows 2000
(http://support.microsoft.com/kb/304403/ )Exchange considerations for promoting a domain controller to a global catalog server
(http://support.microsoft.com/kb/305065/ )Exchange Server-related considerations for demoting a global catalog server to a domain controller
813033For additional information about how to plan and configure an Exchange messaging system, visit the following Microsoft Web sites:
(http://support.microsoft.com/kb/813033/ )Availability of the "Understanding and Troubleshooting Directory Access" book
Best Practice Active Directory Design for Exchange 2000
Planning an Exchange Server 2003 Messaging System
Article ID: 875427 - Last Review: October 25, 2007 - Revision: 2.5