My small office uses a public calendar which is shared between six people. The calendar entries go back to 2009.  We noticed just now that all of our calendar entries from March 2014 back have disappeared, as well as the color-coding that each of us individually had.  No one is fessing up to having done anything.

How can we get our calendar entries back? We need them for various reasons.

I just got set up on Outlook at work.  I want three calendars: Public, Meetings/Schedule and Private.  Public and Meetings/Schedule will be public.

When I set up a new calendar then calendar copies my dates and meetings from my default calendars. (which I made my public calendar and opened up permissions.) When I delete a event in one calendar its deletes that event in all the calendars.  I want to separate these calendars, so they tracking is for difference purposes. 

I set up my Private Calendar under another Calendar Group, and set up my Meetings/Schedule Calendar as a shared calendar.

Please advise.