This Intune update isn't optional - it's a kill switch for outdated apps

"Microsoft is updating its Intune MAM to support new security requirements starting January 19 or "soon after", requiring that all iOS-wrapped apps, iOS SDK-integrated apps, and the Intune Company Portal for Android be updated to the latest Intune versions to keep them secure and running. This means that enterprises that haven't updated to the latest versions will be blocked from launching their apps altogether. And, this may not just include custom apps wrapped in Intune MAM, but other frequently-used ones such as Outlook and Teams."

"Microsoft Intune is a core component of the Microsoft Modern Workplace. Its MAM features help enterprises secure their data on both corporate and personal devices. Using it, IT teams can manage corporate apps like Outlook or Teams without having to manage the entire device. This type of unified endpoint management (UEM) supports feature deployments, updates, and retirement of apps, while also protecting corporate data and preventing data leaks, with (ideally) minimal disruption for the user."

Microsoft will enforce new Intune MAM security requirements beginning January 19 or soon after. All iOS-wrapped apps, iOS SDK-integrated apps, and the Intune Company Portal for Android must be updated to the latest Intune versions. Apps that are not updated will be blocked from launching, potentially affecting custom enterprise apps and common apps such as Outlook and Teams. Intune MAM enables IT teams to manage corporate apps and protect corporate data on both corporate and personal devices without full device management. Administrators must update and push required versions, including iOS SDK version 20.8 for LOB and custom iOS apps.

Read at Computerworld