Thanks for posting!
I understand that you were unable to establish a trust between a Windows NT
4 domain and a Windows 2003 domain to prepare for a migration.
You were receiving the following error "the User account already exists".
Based on my further research, please let me provide you with the following
information for your reference:
You had a trust set up with that domain previously, and had removed it,
using the Trust Relationship dialog box in the Policies tool in User
Manager. However, it was not removed from the registry on the primary
domain controller (PDC).
The administrator will have to remove the trust from the registry in order
to be able to set up the trust again.
WARNING: Using Registry Editor incorrectly can cause serious, system-wide
problems that may require you to reinstall Windows NT to correct them.
Microsoft cannot guarantee that any problems resulting from the use of
Registry Editor can be solved. Use this tool at your own risk.
1. Log on as an administrator to the domain from the PDC.
2. Start the Registry Editor (REGEDT32.EXE)
3. Switch to the HKEY_LOCAL_MACHINE on Local Machine window
4. Highlight the SAM key. The SAM key will be grayed out by default because
the administrator does not have full control for that key.
5. Give the administrator full control to that key and its subkeys. The
administrator should then be able to access that SAM key.
6. Remove the domain name of the domain you are trying to set up the trust
with from the following location:
We saved this key and deleted it.
After removing that entry from the registry, you should then be able to set
up the trust in the Trust Relationship dialog box in the Policies tool in
I hope my information helps. If there is anything that is unclear, please
feel free to let me know.
Thanks & Regards,
Microsoft Online Partner Support
Get Secure! - www.microsoft.com/security
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