This problem has shown up lately, and the issue is that the third party program is trying to do a sync. This is unnecessary. We can set a registry key to disable this. Try:
Exit Outlook and disable sync for these addins. If there is already a value for SyncDisabledProcesses, we can use it. Otherwise create it. You can put this in either HKEY_CURRENT_USER\Software\Zimbra or HKEY_LOCAL_MACHINE\SOFTWARE\Zimbra (if 64bit machine, HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Zimbra). That is up to the admin. Assuming the former, and that the SyncDisabledProcesses value is not already there:
HKEY_CURRENT_USER\Software\Zimbra
Right click on Zimbra
New String value
Name the value SyncDisabledProcesses
Double click on the value to edit the Value data
In the Value data box, put PEACHW.EXE;TURBOREP.EXE |