How to migrate Exchange Server 5.5 users from a Windows NT 4.0 domain to Exchange 2000 in a native Windows 2000 domain

This article describes how to migrate Exchange Server 5.5 users from a Microsoft Windows NT 4.0 domain to Exchange 2000 running in a native Microsoft Windows 2000 domain.

1. Run the Active Directory Migration tool (ADMT) to migrate the accounts in the Windows NT 4.0 domain to the Windows 2000 domain. This creates an additional security ID (SID) on the accounts in the Windows 2000 domain with the Windows NT 4.0 SID. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
   260871� How to set up ADMT for Windows NT 4.0 to Windows 2000 migration
2. Follow the procedures described in the following Microsoft Knowledge Base article for moving users with the Move Mailbox method to the Exchange 2000 server:
   316886� How to migrate from Exchange Server 5.5 to Exchange 2000 Server

When you move the users from Exchange Server 5.5 to Exchange 2000, the account is stamped by Exchange 2000 with the mailbox rights. The user account in Windows 2000 will then have the mailbox rights to access the mailbox. For more information, click the following article numbers to view the articles in the Microsoft Knowledge Base: