Domain-joined systems must use Windows 10 Enterprise Edition 64-bit version.
Features such as Credential Guard use virtualization-based security to protect information that could be used in credential theft attacks if compromised. A number of system requirements must be met for Credential Guard to be configured and enabled properly. Virtualization-based security and Credential Guard are only available with Windows 10 Enterprise 64-bit version.
How this relates to the STIG checklist: STIG vs SCAP benchmark.