In the Web Portal, navigate to Jobs > Recurring Job Profiles. From there, you can search for the jobs you wish to reschedule the recurring information for.
Check the box next to the desired jobs > a pop-up will appear at the bottom of the screen and you can pick the Edit Multiple option if you want to reschedule multiple recurring jobs.
You will be given a popup modal where you can then set the new scheduled recurring jobs. Select Save once you've made the desired changes.