I have currently set up two calendars. One of which I will call Master, for
me to oversee all my schedules. I want to use my secondary calendar to
detail information and meetings etc which is solely relevant to another set
of users and not include all my items.
Is there anyway of entering the information only once, in either calendar,
so as I retain the integrity of each without having to enter everything
twice? It is particularly important as when I sink with my mobile phone,
items in the Master Calendar only will copy. Alternatively, is there a way
to sync items included in what is my secondary calendar?

Thanks in advance to anyone who maybe able to help.