On generating a calendar that supports Long Description (Agenda, Schedule or Spreadsheet Table) you may receive the following message:
This is per a security mechanism in Outlook that notifies you when any program tries to access 'sensitive' Calendar data - even if the calendar data does not contain email addresses. WinCalendar does NOT store, harvest or transmit any email address information. This message appears as a precaution even if a program is just accessing a Calendar Appointment item 'Body' data.