We will be retiring the Teams support on Android 4.4. Instead we recommend that users upgrade to newer Android builds, which is where we will continue to invest.
Key Points:
[How this will affect your organization:]
If you have devices running Android version 4.4 You are receiving this message because our reporting indicates one or more users in your organization are using Android devices that has Android version 4.4
The exiting Teams build 1.0.0.2020050801 will continue to work on Android 4.4 for the next 2 months but there won't be any app updates going forward.
[What you need to do to prepare:]
Instead of using Android 4.4, we recommend updating the Android OS version to 5 and above.