I struggled a couple of weeks before I came across a great post about installing CUCM on a vmware workstation. I needed this for CIPT1 labs.

Strangely, the website has been taken down due to a hacking attempt.

Well, everything seemed to work fine until the NTP configuration step. Here, I’ve discovered that , when configuring NTP server, make sure your guest machine can connect to the internet and check the public NTP server. So if you have a computer firewall, disable it.