After discussion on Messenger Connect forums, it seems Messenger Connect only return verified email address. I set up to 'account' because I wasn't sure. I tested on Windows Live I cannot add new address and use it as Preferred address before verifying it. I revert back to 'preferred' so.
After discussion on Messenger Connect forums, it seems Messenger Connect only return verified email address. I set up to 'account' because I wasn't sure. I tested on Windows Live I cannot add new address and use it as Preferred address before verifying it. I revert back to 'preferred' so.

fproject/moodle-auth_googleoauth2,fproject/moodle-auth_googleoauth2