Our organization is deploying Office 365 Enterprise Apps, after installation and when attempting to activate the product after launching an Office App the sign-in is directed through our 2FA as designed but the login is denied. 

When investigating the login failure, our 2FA system is reporting that the login sourced from User Agent "Edge WebView 18.19044" - which from my investigation indicates Legacy Edge WebView. This login is denied due to being an unsupported browser

From what I understand the O365 login runtime should be using Edge WebView2 and if it were, the login should be allowed since WebView2 is Chromium Edge based (which is supported)

Our environment should meet the requirements for O365 to be able to use WebView2:

OS: Windows 10 21H2

Office 365 Apps Version: 16.0.16.26.20238

Microsoft Edge WebView2 Runtime Version: 112.0.1722.34

I've attempted to uninstall and reinstall WebView2 on multiple machines with no luck. 

Any idea as to what is causing the O365 activation to appear to use Legacy Edge WebView rather than WebView2? Any suggestions to try and force the usage of WebView2? Any tools that can be used to further confirm the O365 activation prompt is using Legacy WebView instead of WebView2? 

Any help is appreciated!