Correct. You have to call MS and request that the points be banked. There are banking deadlines that determine when and how many points you may bank. The deadlines depend upon your use year.
Generally:
You have until the end of the 6th month following your use year to bank up to 100% of your total annual allotment of points.
You have until the end of the 9th month following your use year to bank up to 50% of your total annual allotment of your points.
You have until the end of the 10th month following your use year to bank up to 25% of your total annual allotment of your points.
No banking is allowed in the 11 and 12th months.
Percentages are cumulative. Banking is a final transaction and cannot be reversed if you later change your mind.
Best wishes -
Best wishes -