Need to deactivate all the calender events at once

Situation:

We have installed Adeptia 6.0 on the new ports. so, we are trying to migrate all the process flows and relative activities from old adeptia to new adeptia . So, I guess this will migrate the relative events also. I would like to deactivate all the events for some particular time. Can you please tell me how can to deactivate all the events at once

Solution:

To deactivate all the events at once select the check-box displayed at the top of all the check boxes on the Event manage page.