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ITsVISTA KB-Link: KB975943

Error code when an application uses the CredSSP if the authenticated user account is a member of many security groups on a computer that is running Windows Vista or Windows Server 2008: “0×80090329″

Consider the following scenario:

  • You run an application that uses the Credential Security Support Provider (CredSSP) to perform user authentication on a computer that is running Windows Server 2008 or Windows Vista.
  • The authenticated user account is a member of many security groups.

In this scenario, the authentication may fail and the application returns the 0×80090329 error code.

You frequently encounter this problem in the following scenario:

  • You use the Remote Desktop Connection utility on a client computer that is running Windows Server 2008 or Windows Vista to try to log on to a terminal server that is running Windows Server 2008.
  • On the terminal server, the Allow connection only from computers running remote desktop with network level authentication option is enabled for the RDP-Tcp connection.
  • The user account that you specify in the Remote Desktop Protocol (RDP) client is a member of many security groups.

In this scenario, you cannot start the terminal server session. Additionally, you receive the following error message:

An authentication error has occurred (Code: 0×80090329).

There is a download that resolves this issue. See Hotfixes for details.
32-bit Download: Contact Microsoft
64-Bit Download: Contact Microsoft

For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB975943.

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