When you create a task and includes invitees to the task, you can check their availability. Based on the time duration that you specified, Convergence verifies whether the invitee is occupied with another event at the same time, and provides you the result.
To check the availability:
1. Type the e-mail id of the invitee.
2. Click Check Availability.
That was the last day to use the free vouchers that I got from Sun. I got 79 %.