Refer to the exhibit. A collaboration engineer needs to replace the original, single NTP server that was configured during the initial install of a Cisco UCM server. What is the first step to…

Restarting the NTP service prematurely, before deleting the old server and adding the new one, would only cause the system to continue trying to sync with the incorrect server.

Enabling NTP authentication is a security measure for the new server, but it is not the first step in the process of replacing an old server; the old server must first be removed.

Stopping the NTP service is not the initial step for replacing a server; the primary action is to manage the server list itself, and the service would typically be restarted after changes, not stopped first for replacement.

In Cisco UCM, when an NTP server needs to be replaced, the initial and crucial step is to remove the existing, incorrect, or deprecated NTP server entry from the system's configuration. This action ensures that UCM no longer attempts to synchronize with the old server, thus preventing potential time synchronization issues and allowing for a clean transition to a new NTP source.