This object gives the specific cause code for a recorded session failure, distinguishing reasons like authentication failure, authorization failure, system capacity exceeded, or the peer aborting the session. An admin scanning a batch of failure rows uses this field to separate credential problems from capacity problems from network/peer issues, each demanding a different fix. Dozens of rows showing sysCapExceeded(5) would point the admin toward a licensing or hardware capacity upgrade rather than a password-reset campaign.