The Independent DeltaV Domain Controller (IDDC) decouples the Windows Domain Controller role in a DeltaV domain from the DeltaV ProfessionalPLUS (as the first promoted domain controller) and DeltaV Application Station (as an additional domain controller). The Independent DeltaV Domain Controller improves performance on the ProfessionalPLUS (or Application Station) and adds additional security to the DeltaV system.