For the error code AADSTS1002016 please refer to this article.
In some situations you may encounter an error message while authenticating in Easy365Manager:
In most cases the error message will contain an AADSTS (Azure Active Directory Security Token Service) error code.
The full error message can be found in the event log:
To find out more about AADSTS error codes and how to fix them, please refer to this page.
If you’re unable to solve the problem please contact the Easy365Manager Helpdesk.