Use Microsoft Flow to receive an email for changes to Office 365 IP Addresses and URLs

Hello Paul,

we want to use this in our company in Germany to keep track of the IP changes. I've setup the flow and struggle with step 10 (HTTP2) - the flow hangs here. It's not reaching the next step (tested it with inserting a Mail notification between the two HTTP2 / HTTP3 steps, but the mail is not send. 

If I replace the URL with just some other URL (like https://www.google.com), it continues until the end. I even copied the content of the Microsoft URL into a .json file and put it on one of our webserver and used this address - then everything works like it should.

I tested this URL ( https://endpoints.office.com/endpoints/worldwide?clientrequestid=a10c5ed1-aad1-445f-b386-b912226339a8) from HTTP2 to query the IP details before in the browser to make sure it's working (which is the case). I even changed the ClientReuest ID to something else, but without any change. When I go into the URL field in HTTP2, mark the URL and copy it to the browser, it works well!

Looks like the Flow engine has a problem to reach this URL...?

BTW - Tested it in two different tenants - same in both tenants!