Sorry if the title doesn't make much sense.
Essentially I've got a Master list (which also runs automated emails etc) where items are added with due dates.

On creation of the list item a folder will be created in the relevant departments library with some of the list items column details transferred across. Note: Each department has their own separate SP library (11 in total), the list item is assigned to a SP library using a Control Case and a choice menu on the master list.
(dates don't match because different entry)
Now once the due date and the next date pass it is likely to be assigned another set of dates until the matter is completed. These dates will be updated on the master list item. I am wondering how I automate these dates to update on the associated existing folder upon the master list being updated.
Any help would be appreciated!!