Voicemail not Authorized in API

Hello, I am trying to use the voicemail rest app on Yealink phones and when I create new extensions, provisioned with end point manager I get “Voicemail is not authorized in the API for extension 7000.”

These extensions have already logged in with commedian mail, changed their password and recorded their name.

I don’t know what I’m missing.

Didn’t look hard enough in the forms before hand. That person did have a user in the user manager