Now that multiple services have stopped supporting IE11 coupled with the end of support for legacy Edge, it is imperative that we transition to an updated browser on all of our devices. IE11 is already unsupported for multiple Microsoft services, and the list will grow over time. For example Microsoft Teams support ceased on the 30th November 2020, and overall Microsoft 365 support ends on the 17th August 2021
Please also see the Yammer support statement on IE11.
As part of the overall process to update to Edge Chromium, IE11 should be removed once all application compatibility issues are addressed. There needs planning and testing for application compatibility, so ensure that has happened.
IE11 is supported via the component support policy of the Windows OS, and you can find those details here.
We can remove IE11 using the Optional Features section in the UI, but it is easy to automate and run the removal via PowerShell:
Disable-WindowsOptionalFeature -FeatureName Internet-Explorer-Optional-amd64 –Online –NoRestart
Note that the "-NoRestart" was added. You can remove this if desired to meet your needs.