We upgraded Zimbra from 4.0.11 to 5.0.9
Most Users use outlook with zimbra connector and some use the zimbra webinterface.
Since the upgrade some users (mostly webinterface users) have problems with reminders.
Some reminders come 1 hour late or not at all.
This happens with group and also single reminders.
Someone has an idea how to solve the problem or where to look in logfiles if something went wrong?