How to upgrade Windows 2000 domain controllers to Windows Server 2003
Use the English version of this document,
it is regularly updated. The Windows Server 2008 (r2) version is here:
Upgrade Domain Controllers: Microsoft
Support Quick Start for Adding Windows Server 2008 or Windows Server 2008 R2 Domain Controllers to Existing Domains
Published : 2014-01-30.
Last updated : 2017-05-11.
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