I was using Outlook 2010 on Win7 with a different email host. I used gSyncit to sync my calendar and tasks to Pocket Informant Online which in turn synced to Pocket Informant on my iPhone 5. When I switched to Zimbra, the zdb created by Outlook file is only partially compatible with gSyncit (which is designed for pst files). Some appointments sync, but most of my recurring appointments produce a "Not a legal OleAut date" error which indicates a problem reading the appointment's end date. Recreating the recurring appointments didn't help. If there's no fix for this, I'll have to make a decision about going back to my old system (I'd rather not) or staying with Zimbra and giving up Pocket Informant (equally disappointing). Does anyone know of a fix or workaround?