I'm trying to register some Poly VVX 150/250 phones to a demo webex calling site we have setup. I have followed the process in this link
https://help.webex.com/en-us/article/njwkamr/Poly-and-Yealink-support-on-Webex-Calling#
to the letter but still won't register to Webex. I've tried both the polycom.broadcloud.eu and the polycom-eun.bcld.webex.com URLs but both the same. Got them plugged into my home network so no unusual security / firewall setup (running webex cscan tester gives good results from my network
Have the MAC address correctly entered into Webex Calling. How can I troubleshoot where this is going wrong without trying to get packet captures etc?
