Hi All,
Have a client that is trialling Zimbra at the moment with us and had an issue
this morning with server locking up with CPu and memory errors. in the end rebooted server as it had locked. but the ZD client lost connection and then would not show calendar for the users. upon restarting the ZD client fully it was fine. The calendar was there in web client so i know the server was showing it, just the ZD was not refreshing properly until restarted.

Any one else had this issue ?

Will post about the server issue seperately.