Starting June 15 2022, Microsoft will no longer support Microsoft Defender for Identity sensors on servers running Windows Server 2008 R2.

Microsoft recommends that admins identify any remaining domain controllers (DCs),  AD FS servers and AD FS Proxy servers that are still running Windows Server 2008 R2 as an operating system and make plans to update them to a supported operating system.

For the two months after June 15th 2022, Microsoft Defender for Identity sensor installations will continue to function. However, after this two-month period, starting August 15, 2022, sensors will no longer function on Windows Server 2008 R2 platforms.

Note:
For admins looking to upgrade their environments to Windows Server 2022, the Microsoft Defender for Identity sensors are not yet supported on this operating system.