Hello. With the use of the 'Reschedule' feature in the Releases menu, you can update the Start and/or End dates for multiple releases at once, as long as the releases highlighted will have the same dates. Releases with different dates will need to be rescheduled separately. For the releases you wish to update, you will need to highlight them in the 'Releases' list, right-click, then select 'Reschedule' from the menu displayed. In the 'Reschedule Release' window, you can edit the Start and/or End date to the desired date. Once you have selected the desired date(s), click the 'OK' button. Once the 'Reschedule Release' window closes, you will then see the changes in the 'Details' section.