Azure AD app migrate JWT to Oauth

Afternoon,

I am trying to migrate from the deprecated AZURE AD JWT app for user provisioing across to the OAUTH app.

I am following this guide https://support.zoom.us/hc/en-us/articles/15053773250573, but at step 8 I find the "Authorize" button is greyed out.

I have renewed the JWT token as suggested but no change.

The authorize option is not greyed out if I create a new app, but not changing the existing - What am I missing?

Any assitance or suggestions appreciated.

Regards,