When you start creating a Everbridge Suite Zap, you will be asked to connect your Everbridge Suite account.
When you click connect, you will then be asked to enter your Everbridge Suite username, password and Organization ID.
To locate your Organization ID you can find this in your Organisation settings under Base Information.
If those steps were correct, you'll get sent back to your Zap where you will now have your Everbridge Suite account successfully connected!