A “Holding Account” is basically a valet parking space for points from a DVC Resort reservation that has been changed or canceled anywhere from 30 days to one day prior to your scheduled arrival date. There are some fairly strict guidelines for how these points can be used:

• The points can be used for a new DVC Resort reservation during your current UY as long as the reservation is booked 60 or fewer days before the new check-in date. In other words, if you plan to utilize these points for a DVC Resort vacation, you’re limited in your vacation planning; you cannot book a DVC Resort vacation more than two months in advance.
• These vacation points can also be used for an exchange, with the following limitations: For the Disneyland Resorts and the World Passport Collection, you may make a reservation as long as the reservation is booked 60 or fewer days before your check-in date. For The Disney Collection [excluding the Disneyland Resorts], Concierge Collection, or Adventurer Collection, you must make the reservation four or more months before the end of your UY, and that reservation must be for a check-in date that is 60 or fewer days away.
• These points cannot be banked or borrowed.
• These points will expire at the end of your Use Year if they’re not used.