I modified some policies using the Desktop Manager but the modification is not seen on my client machines

One of the assumptions made when designing the Configuration Agent is that policy data created by the Desktop Manager is relatively static, that is, not subject to frequent change. This assumption results in an approach where the Agent intermittently consults the Policy Repository to see if modifications have occurred. By default, the Agent checks the repository once an hour for all running desktop applications. As a result, when you make a change with the Desktop Manager, you need to wait up to one hour before running desktop applications are notified of the change. If you want, you can use the Agent Configuration Wizard (/usr/bin/apoc-config) to change the value of the "General Detection Interval" to increase the frequency of repository checks. Alternatively, you can force the Configuration Agent to refresh policy data for all connected applications by becoming superuser and executing the /usr/lib/apoc/apocd change-detect command.