Hello @Anders Olsson The improvements in Active Directory Domain Services installed on Windows Server 2016 over ADDS in Windows Server 2012 includes:
- Privileged access management
- Extending cloud capabilities to Windows 10 devices through Azure Active Directory Join
- Connecting domain-joined devices to Azure AD for Windows 10 experiences
- Enable Microsoft Passport for Work in your organization
- Deprecation of File Replication Service (FRS) and Windows Server 2003 functional levels
You can read more about these improvements here: https://learn.microsoft.com/en-us/windows-server/identity/whats-new-active-directory-domain-services
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