Managing Azure Reservations

You can buy an Azure Reservation to save money on the infrastructure charges (compute) for virtual machines or Azure SQL Databases. After purchase you can make adjustments to that reservation: change the Subscription it applies to, split a single reservation into two reservations, add or change users who can manage a reservation, and optimise for VM size flexibility or capacity priority.

Find a useful article with instructions here: http://bit.ly/2PnMOUC.