The applying configuration completes successfully and the changes are visible in the XI interface, but you're still seeing an error message in the CCM that says "Configuration File Is Out Of Date".
This problem is related to the system time not being configured correctly.
Please follow this guide on how to correctly define the timezone on your Nagios XI server:
Documentation - Changing The System Time
For any support related questions please visit the Nagios Support Forums at:
Article ID: 159
Created On: Tue, Jan 26, 2016 at 12:34 AM
Last Updated On: Mon, Feb 22, 2016 at 7:28 PM
Authored by: tlea
Online URL: https://support.nagios.com/kb/article/nagios-xi-configuration-applies-but-still-get-configuration-file-is-out-of-date-error-159.html