This syncs too infrequently for me. To increase the frequency that the NTP Client will poll your time server, go into regedit key:
and look at the SpecialPollInterval. This is the number of seconds between updates.
To change it to 24 hrs, use 86400 (this is 1 * 24 * 60 * 60). By default it is set to update once per week (604800).