How to change NTP server address in Windows 2012 R2?

Question

NTP

There is a Windows 2012 R2 server. I needed to change the NTP source address for this server. Launched Regedit.
Checked that NTP is enabled:
HKLM\System\CurrentControlSet\services\W32Time\TimeProviders\NtpServer\Enabled = 1
Specified a new IP address:
HKLM\System\CurrentControlSet\services\W32Time\Parameters\NtpServer = XXX.XXX.XXX.XXX, 5
Updated the NTP config:
w32tm /config /update
I'm looking at the current NTP config - the IP address is old.
w32tm /query /configuration Restarted
NTP just in case - didn't help.
net stop w32time && net start w32time
The server is not a member of any domains. Poke your nose in which direction to dig?