Windows Small Business Server 2003 R2 Transition Pack

Using Windows Small Business Server 2003 R2 Transition Pack you can upgrade your computer running Windows Small Business Server 2003 R2 to Windows Server 2003 R2, Standard Edition, and the standard versions of the server applications. After performing this migration, you will be able to do the following:

Transfer the operations master role to another domain controller.
Establish trust relationships to and from another domain, or add child domains to your existing Active Directory forest.
Move server applications to another server. After the migration, you can move the server applications off of the original server. You might choose to move one or more applications to a separate server to improve the performance of the application. For example, if you are going to add more than 75 users, moving Exchange Server 2003 to a different server can help that application to perform better with the new user load.
Enable Terminal Server.
Increase your maximum number of users.
Increase the maximum number of processors supported from two to four.

After you have migrated your server:

You will still be able to use the Windows Small Business Server tools; however, they will no longer be supported and you will not be able to reinstall or remove the tools.
You will no longer be able to run Windows Small Business Server 2003 R2 Setup to modify (add, remove, re-install) the server applications.
Your business will be licensed for one copy of Windows Server 2003 R2, Standard Edition, and the standard versions of the server applications.
You will have five client access licenses (CALs) for each server application. If you have more than five users, you must purchase additional CALs for each of the individual server products. For information about purchasing additional CALs, see the individual server product pages at the Microsoft Web site (http://go.microsoft.com/fwlink/?LinkId=16457).

After you migrate to Windows Server 2003 R2, Standard Edition, you must reinstall your existing Windows Server 2003 service packs. In addition, you should record the current built-in Administrator account password for reference because the Directory Services Restore Mode password will no longer be synchronized with the built-in Administrator account password.