If you have logged in to your Zimbra administration interface and been told that "Some services are not running" despite what zmcontrol status is telling you there may be a problem with the cron scripts.
You can force a manual update by running:
# sudo -u zimbra /opt/zimbra/libexec/zmstatuslog
To re-load the cron settings perform the following:
# cd /opt/zimbra/zimbramon/crontabs # cat * > crontab.zimbra # sudo -u zimbra crontab crontab.zimbra