Setting a method for color-coding your Meetings

(Agenda View | Tools | Options | Meeting Colors)

Choose a method for color-coding your Meetings from the pull-down menu:

Importance level: Best used if you routinely assign different importance levels to Meetings
Attendance status: Best used if you have chosen to display refused Meetings
Ownership: Best used if you want to see which Meetings are yours and which ones other people have booked in your Agenda.

If you color-code Meetings by ownership and you open another user's Agenda, Meetings you have proposed appear as Entries you own. If you are working as a Designate in another user's Agenda, Meetings that user has proposed appear as Entries you own, since you are working in that person's Agenda as if you were the owner.