This document is correct. Cisco IP Telephony servers can synchronize their clocks with either an external network time server using X Network Time Protocol (XNTP) or between Cisco CallManagers using various Windows utilities. It is not possible to configure the Cisco CallManager Server as a NTP Server as a Cisco CallManager Server can only act as a client.
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.