After setting up Windows Authentication in Vault Server for Vault Collaboration or Manufacturing 2010, Users are unable to log in to the Vault and see this message.
"Windows Authentication failed with the data management server. Please make sure you are in the same domain as the data managment server."
Apart from the obvious solution of making sure that you are in the same domain as the Vault Server, as per the "Readme_Manufacturing.html" document...
"If you are planning on using windows authentication within Vault Manufacturing when using Windows Vista or Windows Server 2008, the "Windows Authentication" service for IIS will need to be installed."
If you have already installed Vault Server but did not install Windows Authentication on IIS beforehand, then you can enable WinAuth afterwards, see this later article “How To... Enable Windows Authentication After Vault Server Installation”
Windows Authentication\Active Directory Integration will not work for Vault Basic or Vault Workgroup. You must upgrade to Vault Collaboration or Vault Manufacturing to have this feature.