Log into the GreenAnt webmail.
In the Settings menu on the select the
Enter your current password and then the new password twice.
Be sure to click the
Set New Password button to save the new password.
You can go directly to the setting using this URL: https://webmail.greenant.net/#/settings/change-password
Note: Be sure to use UPPER and lower case letters as well as symbols (%#$&) and numbers. This will help make your account more secure.