Under the Compatibility tab, select the compatibility settings based on the earliest versions of the operating systems running in your environment.

Option

Minimum version

Certification Authority

Server 2012 R2

If you install a Windows Server 2016 CA, read the following Microsoft troubleshooting guide: Cannot select Windows Server 2016 CA-compatible certificate templates from Windows Server 2016 or later-based CAs or CEP servers.

Certificate recipient

Windows 8.1 / Server 2012 R2. Earlier versions of Windows may not recognize template options introduced in later versions of the Windows certificate templates.