Yes, You need to generate BUSY application password in order to configure email in BUSY.
To generate the application password from gmail account, follow these steps:
Step 1 : Log in to your email account then go to security option
Step 2 : Now, enable two step verification
Step 4: Then, find the option to generate app passwords and select it.
Step 5 : Choose the app and device for which you want to generate the app password.
Step 6 : Once generated, copy the app password and paste it in the password field of your email configuration in BUSY.