DOCUMENT:Q126640 08-AUG-2001 [winnt] TITLE :Setting Up a Backup Domain Controller Stated Incorrectly PRODUCT :Microsoft Windows NT PROD/VER: OPER/SYS: KEYWORDS: ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows NT Server version 3.5 ------------------------------------------------------------------------------- Page 38 of the "Windows NT Server Concepts and Planning Guide" incorrectly states: (However, if you have an existing backup domain controller in a different domain, you can move it from that domain to another.) This is incorrect. Windows NT identifies each domain by it's security identifier (SID), a unique number assigned to the domain. If Windows NT Server is moved from one domain to another, the new domain name and the original SID will not match. There is no way to replace the original SID without reinstalling Windows NT Server. Page 23 of the "Windows NT Server Installation Guide" correctly states the procedure of joining different domains: After Setup is finished, the only way a Windows NT Server computer can join a different domain is if you reinstall Windows NT Server. Additional query words: prodnt ====================================================================== Keywords : Technology : kbWinNTsearch kbWinNT350search kbWinNTSsearch kbWinNTS350 kbWinNTS350search ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2001.