Theirs, usually.
There's a training topic at
http://office.microsoft.com/training/Training.aspx?AssetID=RP010329651033
that should help.

Signature
TechieBird
http://bwain-dump.blogspot.com
> I have recently been given the duty as the meeting organizer for 4 different
> people. When I set up meetings for my boss (or anyone else) do I set them up
> from their calendar or mine. This is the confusion (my calendar or theirs?)