Microsoft KB Archive/294992

= &quot;RPC Server Is Unavailable&quot; Error Message Occurs When You Configure an External Trust =

Article ID: 294992

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Windows 2000 Server
 * Microsoft Windows NT Server 4.0 Standard Edition

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This article was previously published under Q294992



SYMPTOMS
When you create an external trust between a Windows NT 4.0 domain and a Windows 2000 domain, if you add the Windows NT 4.0 domain to the Domains that trust this domain box on the Trusts tab in the Windows 2000 domain properties, the following error message is displayed in the Active Directory Domains and Trusts snap-in:

The RPC Server is unavailable.

If you run the net view \\  command on the Windows 2000 domain controller, (where windowsnt4pdc is the NetBIOS name of the Windows NT 4.0 primary domain controller [PDC]), you may receive the following error message:

System Error 64 has occurred.

The specified network name is no longer available.



CAUSE
This issue can occur if Server Message Block (SMB) Signing is enabled on the PDC of the Windows NT 4.0 domain.



RESOLUTION
To work around this issue, use either of the following methods:
 * Disable SMB signing on the Windows NT 4.0 PDC.

-or-
 * Before you enable the trust on the Windows 2000 domain controller, run the following command in Windows 2000 Server, and then provide the correct password for the account: &quot;net use \\windowsnt4pdc\ipc$ /u: \administrator *&quot;



STATUS
Microsoft has confirmed that this is a problem in Windows 2000.



MORE INFORMATION
For additional information about SMB Signing in Windows NT 4.0, click the article number below to view the article in the Microsoft Knowledge Base:

161372 How to Enable SMB Signing in Windows NT

Keywords: kberrmsg kbprb KB294992

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