name : update-group-certificate-configuration.rst **To update the expiry of a group's certificates** The following ``update-group-certificate-configuration`` example sets a 10-day expiry for the certificates generated for the specified group. :: aws greengrass update-group-certificate-configuration \ --group-id "8eaadd72-ce4b-4f15-892a-0cc4f3a343f1" \ --certificate-expiry-in-milliseconds 864000000 Output:: { "CertificateExpiryInMilliseconds": 864000000, "CertificateAuthorityExpiryInMilliseconds": 2524607999000, "GroupId": "8eaadd72-ce4b-4f15-892a-0cc4f3a343f1" } For more information, see `AWS IoT Greengrass Security <https://docs.aws.amazon.com/greengrass/latest/developerguide/gg-sec.html>`__ in the *AWS IoT Greengrass Developer Guide*.