When running a diagnostic test on the deployment profile it does three tests. The third test is checking for connection from 85.214.114.20X to your micollab server on TCP port 36008 (through your MBG web proxy possibly)
You can test this manually via web browsing to this URL: https://mcdiagnostics.easydeploy.net/ucawebsocket/?ucahost=The FQDN of the Micollab server
e.g. https://mcdiagnostics.easydeploy.net/ucawebsocket/?ucahost=micollab.pmhaynes.co.uk
The web page should show “{“msg”:”(200 OK)”}” Anything else means the connection is blocked
e.g “Incomplete response received from application” is a response i got when the port was blocked by the firewall