Exchange ActiveSync version check

Checking for Exchange ActiveSync version 16.1 or higher From Microsoft: We want to inform our users and organizations about an important upcoming change regarding Exchange ActiveSync (EAS) device connectivity to Exchange Online. Starting March 1, 2026, devices running ActiveSync versions lower than 16.1 will no longer be able to connect to our services. EAS 16.1 was released as a part of Exchange Server and Exchange Online in June 2016.

Microsoft Sentinel (KQL)