As a quick add on to this resolution, I have noticed something that maybe should be included in the Juniper documentation or, at the very least, explained....
When configuring the Authentication, we get two options as shown:
Authentication-key
Authentication-password
Obviously, in our case "password" was required (and I believe this will be in every case..... but, this is the important part, when we then look at the config, there is no "authentication-password" there, even though that is what we configured. It has changed it to "authenticaiton-key", hence in the Juniper documentation it says "key".
This is very mis-leading from a documentaion perspective and should be changed.
Just a thought.... 🙂