I have logged a ticket with support (Case 803043). We are having an issue with Windows 10/Edge unable to access login.microsoftonline.com when using Zapp.
Other browsers (IE/Chrome) are able to access login.microsoftonline.com via Zapp.
Edge is able to get onto other websites via Zapp.
As edge is unable to access the above website, we are unable to configure Outlook CtR.