Do you arrange and / or attend many meetings? Do you spend more time deciding when to meet than meeting? I, personally have scheduled meetings with my colleagues where some of them can’t make it or it conflicts with some other appointment they have, up to the point where I was constantly arranging the meetings then cancelling them, then arranging them again, just to cancel again. Calendar sharing resolved only half of the actual problem.
One of our smart Salties discovered FindTime. FindTime is an Outlook add-in that allows you to quickly find time to meet with others. FindTime helps you pinpoint times to meet by looking at available free/busy data for your attendees as well as creating a poll where attendees can vote on the times you suggest, and even suggest new times themselves!
Look for the Store Icon in your |Outlook, search for Find Time, and install!