https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-ada2/7b4964b3-d394-4f22-83d4-ed313f18ea79
[MS-ADA2]: Attribute msDS-RequiredDomainBehaviorVersion | Microsoft Learn
This attribute specifies the required domain functional level for an optional feature enabled in a domain-mode scope.
msattributemicrosoftlearn