Just a quick heads-up on a feature allowing you to test the access to the Retail server in The New Dynamics AX.
From a browser open the site:
https://<my server name>ret.cloudax.dynamics.com/healthcheck?testname=ping
It shows you a ping test result looking like this:
If you need the results in a more developer-friendly format you can add a &resultFormat=xml which gives you something like this: