Hi there
I'm going to assume you're using Outlook 2003, let us know if that's not the
case.
You can only set an item to appear as bold in a List view (e.g. Active
Appointments). In Day/Week/Month view you can set a colour to be associated
with items meeting a certain condition, but you can't make the font appear
bold.
For more information, see Outlook's online Help - the topic "Color
appointments and meetings automatically" should have what you need.