You will not find it in the modeler. You need to navigate to the app in the online cloud portal.
Select your app → Click on “General Settings” (left side navigation) → find AppID at the bottom of the page
Open your App in the cloud portal. In the general settings section you can find your AppID
Here a screenshot :
Thank you guys for your support!
I am new with mendix and this my first application. Actually I am trying to test it but still struggling with the configuration.
is here something missing or wrong ?