Windows 2003 mixed mode to native mode?

[John]

Previously I had a mixed environment of Windows NT and Windows 2003 servers,
now there are only Windows 2003 servers, how does one switch Windows 2003
from mixed mode to native mode?

Thanks

[Ada Pan [MSFT]]

Hello John,

To raise domain functional level to Windows Server 2003, please refer to
the following steps. I would suggest you change the settings on the Windows
Server 2003 which first joins the domain. The replication process may last
for 15-20 minutes for all the servers:

CAUTION: Do not raise the domain functional level if you have, or will
have, any Windows NT 4.0 or earlier domain controllers. As soon as the
domain functional level is raised to Windows 2000 native or Windows Server
2003, it cannot be changed back to a Windows 2000 mixed domain.

1. Log on the PDC of the domain with domain administrator credentials.
2. Click Start, point to Administrative Tools, and then click Active
Directory Domains and Trust.
3. In the console tree, right-click the domain for which you want to raise
functionality, and then click Raise Domain Functional Level.
4. Under Select an available domain functional level, click Windows Server
2003, and then click Raise to raise the domain functional level to Windows
Server 2003.

Note You can also raise the domain functional level by right-clicking a
domain that appears in the Active Directory Users and Computers MMC
snap-in, and then clicking Raise Domain Functional Level. To raise the
domain functional level, you must be a member of the Domain Administrators
group.

The current domain functional level appears under Current domain functional
level in the Raise Domain Functional Level dialog box. The level increase
is performed on the PDC FSMO and requires the domain administrator.

For more information, please reference the following articles in Microsoft
Knowledge Base:

How to raise domain and forest functional levels in Windows Server 2003
http://support.microsoft.com/default.aspx?scid=kb;en-us;322692

Raise the domain functional level
http://www.microsoft.com/technet/prodtechnol/windowsserver2003/library/Serve
rHelp/5084a49d-20bd-43f0-815d-88052c9e2d46.mspx

Hope it helps.

Regards,

Ada Pan

Microsoft Online Partner Support
Get Secure! - www.microsoft.com/security
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