@HLShone If you cannot find availability using those extended 2018 banked points, I would be curious if you would be allowed to deposit them into RCI up until October 17th, (45 days before the extended points expire on November 30th)
Depositing into RCI is probably not your most attractive option, but it would be better than completely losing those points. If you call MS on June 10th, I would greatly appreciate you asking if those extended 2018 banked points can be deposited into RCI. (I do not want to call MS myself, since I have nothing that needs to be handled immediately and I do not want to further clutter the MS phone lines)
I have an Aug UY, and my deadline for depositing my 2018 banked points into RCI is June 17th. Those points appear to be eligible for the extension, but I will not be able to use the extended points until after July 31st for reservations between August 1st and November 31st. I would hate to have my points extended, find out I could not use them because there was no availability, and then told it was too late to deposit them into RCI.