Is there a mechanism to set these settings in ArcGIS Pro?
I know this issue is old, but I don´t like unanswered questions 🙂
With ArcGIS Pro 2.8 there is the option to "Sign In Using Browser" How To: Sign in to an ArcGIS Online or ArcGIS Enterprise account using a web browser instead of the ...
It is possible to manually enable this in In ArcGIS Pro version 2.7.2.
If someone is looking for it - it looks like ArcGIS Pro needs access to:
https://www.arcgis.com/arcgisuris.xml
https://www.arcgis.com/home/signin.html
https://webaccounts.esri.com/CAS/index.cfm?fuseaction=Login.ForgotPwd.ShowForm
https://www.arcgis.com/sharing/rest/portals/[ORG-ID]/?token=*
or when using oauth:
https://www.arcgis.com/sharing/rest/oauth2/ *