PSTs set as the default delivery location and Duet
Having a Personal Information Store (PST) configured as the default delivery location for your MAPI profile in Outlook is not supported when you use that same profile for your Duet client. At this time, the Duet client will not function properly if you have your profile configured this way. To remedy the problem, you will need to switch to Outlook cached mode or Outlook in online mode to remedy the problem. You can have an additional PST(s) in the MAPI profile, but just not as the default delivery location.