Contains the reason why a CM's certificate is deemed valid or invalid. Return unknown if the CM is running BPI mode. ValidCmChained means the certificate is valid because it chains to a valid certificate. ValidCmTrusted means the certificate is valid because it has been provisioned (in the docsBpi2CmtsProvisionedCmCert table) to be trusted. InvalidCmUntrusted means the certificate is invalid because it has been provisioned (in the docsBpi2CmtsProvisionedCmCert table) to be untrusted. InvalidCAUntrusted means the certificate is invalid because it chains to an untrusted certificate. InvalidCmOther and InvalidCAOther refer to errors in parsing, validity periods, etc, which are attributable to the cm certificate or its chain respectively; additional information may be found in docsBpi2AuthRejectErrorString for these types of errors.