This is a mobile app only issue.
After successfully signing in with MS Outlook on iPhone, I get the following error:
You can’t get there from here
You must use Microsoft Edge to access this resource.
Since I am not about to install Microsoft Edge, I’d like to know if there are any other ways to log in. F.ex. by associating a Google Account with my Front App account?
Note: I have no issues logging in with the Desktop App.
Update: A quick work around is to use the email / password sign in.