Post reboot of the VMware Identity Manager appliance, you experience this symptom.
The NTP configuration from the appliance settings changes from NTP server time sync to Host time sync.
Environment
Identity Manager 3.3.x
Cause
This issue occurs because NTP is enabled while time configuration is missed in the listed versions.
Note: This is a Linux specific issue.
Resolution
This issue is resolved in VMware Identity Manager 3.3.3, available at Broadcom Downloads.
Workaround:
Replace the /usr/local/horizon/scripts/ntpServer.hzn file with the attached ntpServer.hzn file from this article.
Once the old ntpServer.hzn has been replaced, the configurator User Interface (UI) would function the same way as before and would enable the NTP service.
Note: After the reboot of the instance, the state of the NTP service should persist