modifyCapacityReservation

Modifies a Capacity Reservation's capacity, instance eligibility, and the conditions under which it is to be released. You can't modify a Capacity Reservation's instance type, EBS optimization, platform, instance store settings, Availability Zone, or tenancy. If you need to modify any of these attributes, we recommend that you cancel the Capacity Reservation, and then create a new one with the required attributes. For more information, see Modify an active Capacity Reservation.

The allowed modifications depend on the state of the Capacity Reservation:

• assessing or scheduled state - You can modify the tags only.

• pending state - You can't modify the Capacity Reservation in any way.

• active state but still within the commitment duration - You can't decrease the instance count or set an end date that is within the commitment duration. All other modifications are allowed.

• active state with no commitment duration or elapsed commitment duration - All modifications are allowed.

• expired, cancelled, unsupported, or failed state - You can't modify the Capacity Reservation in any way.