Active Directory Certificate Services (AD CS) has existed since the Windows NT 4.0 era, although under different names. The Active Directory-based architecture was introduced with Windows 2000 Server.
AD CS is tightly integrated into the Windows ecosystem and continues to be widely used by companies and government organizations of all sizes. This long-standing integration and broad deployment demonstrate the reliability and stability of Microsoft PKI.
At the same time, the underlying technology and some implemented protocols do not always reflect the latest security requirements and innovations. To address modern security standards and benefit from current developments in cryptography and PKI technology, it may therefore make sense to supplement or replace Microsoft PKI with a more advanced solution.
A modern PKI can provide enhanced security functions, greater automation, and broader support for current and future use cases, particularly in hybrid and cloud-based environments.