JSI Tip 4624. Dcpromo issues error 2136 when you try to promote a server?

When you run Dcpromo to promote a server to a domain controller, you receive:

   A general network error occurred - Error 2136   Flat name validation of DOMAIN failed with 2136   Request for promotion returning 2136

These errors will occur if the Client for Microsoft Networks and the File and Printer Sharing for Microsoft Networks components are NOT installed. These components are required for the creation of the Netlogon and Sysvol shares.

After installing these components, run Dcpromo.