Best way to edit time/schedule of an outreach?

When i try to edit the time a given outreach is scheduled to go out, I keep butting up against this: https://www.dropbox.com/s/udzy6xn4nwhh5li/Screenshot%202016-03-04%2008.35.56.png?dl=0 - after I change the time, there is no update or edit button available, only the 'cancel' button. Is there a way to edit the time at which a recurring outreach is sent?

Thanks!