This read-create DisplayString specifies, when set, the local collection end time for a PM instance in hh:mm or hh:mm:ss format, per its description, defaulting to 23:59:59 if only cienaCesPmInstanceEndDate is set, and reporting the full end date/time on read with a trailing 'Z' for UTC. This lets an engineer bound a PM collection window to automatically stop at a specific time, useful for a fixed-duration SLA measurement or a time-boxed diagnostic capture that shouldn't run indefinitely. An engineer running a 24-hour diagnostic PM capture would set this end time to exactly one day after the start so the instance stops collecting automatically without manual intervention.