Before you add any licenses, refer to the terms of the new NCE license agreement. Most importantly, you may only reduce Microsoft licenses in a Microsoft subscription during the 168-hour renewal period starting at the subscription auto renewal date. If you reduce a license quantity outside the 168-hour renewal period, you are responsible for 100% payment of license cost through end of the subscription term. Microsoft does not allow any refund outside of the 168-hour period and purchase is final for the new subscription term (Monthly, Yearly or Tri-annual). Microsoft may change this policy at any time.