How to login with Microsoft Exchange account using 2 Factor Authentication?
When logging in with Microsoft Exchange account for the first time - you might be asked to create app-specific password.
Log in to your Microsoft account, go to security tab and press "more security options".
In App passwords section - press "Create a new app password" to generate app-specific password.
Copy generated password
Go back to SyncGene web app enter your user name and paste copied password.
Congratulations! Now you have granted SyncGene access to share and sync your calendar.