Before deleting the CMK, confirm that it is not in use and will not be used.
Before the specified deletion date, you can cancel the deletion if you want to use the CMK. Once the scheduled deletion has taken effect, the CMK will be deleted permanently and you will not be able to decrypt data encrypted by the CMK. Exercise caution when performing this operation.
To schedule the deletion of multiple CMKs at a time, select them and click Delete in the upper left corner of the list.