I have added one guest user for using our company app and bought Per user plan as well. He received Email and when he is click email he is able to open the app but before that few permissions as required. Office 365 Outlook connector is not able to connect and showing error. Look at the screen shots. Any work-around this issue please?
Guest user is using his private Email xxxxx@outlook.com


I tried re-starting the app but same issue every time.