Azure VM Extension failing - Octopus


I am trying to automate VM deployment in Azure and the key step is to get VMs added to Octopus but I am struggling with the following message when trying to provision the Azure VM extension. What am I missing?

> Enabling Tentacle failed. The OctopusServerUrl '' was not found.

The URL is valid and I can manually add tentacle by using this URL, but never through extensions. I have verified that this url is “open”

Hi Jawis, thanks for getting in touch,

I managed to reproduce this issue when the associate network rules have not been configured. Could you please confirm that you have the appropriate outbound rules in place? I would imagine in this case you would need port 443 and port 10943 (polling tentacle) in order for this to work.