@TJ_Devine Will third party login dialog use the Webview2 or Trident(IE11) engine?
NOTE: The change was applied to Version 2210: October 03 Build 15726.20000 but has never made it to a release version.
Office Suite
WebView2 For Third Party Sign-In: This feature updates the current browser engine utilized by the sign-in dialog from Internet Explorer to the chromium-based WebView2 (Microsoft Edge).
https://learn.microsoft.com/en-us/officeupdates/current-channel-preview#office-suite-19
UPDATE: 4/29/24
Installed Office 2024 LTSC and confirmed it still uses IE11/Trident engine for third party login. 😞
We are using ForgeRock as our SSO and cannot login to Microsoft cloud services as they (ForgeRock) require modern JS for current versions.