If you have installed Easy365Manager to a system where Internet Explorer was never used to log in to Office 365, you may see a warning in your browser:
This is due to the standard security settings in your browser. Your browser (Internet Explorer) needs to trust the two Microsoft URLs used during authentication explicitly:
(the URLs may change in the future at Microsoft’s discretion)
Click Add to add the two URLs to the Trusted Sites zone during authentication. This is only needed the first time you login.