Such a course as this might be immodest in another; but I have devoted upward of nine full weeks, first and last, to a careful and critical study of this tongue, and thus have acquired a confidence in my ability to reform it which no mere superficial culture could have conferred upon me.
Remove-ExchangeCertificate: The internal transport certificate cannot be removed because that would cause the Microsoft Exchange Transport service to stop. To replace the internal transport certificate, create a new certificate. The new certificate will automatically become the internal transport certificate.
Mozilla will consider removing a root certificate from NSS if the CA is issuing certificates in a manner that is non-compliant with Mozilla's CA Certificate Policy. (As per the previous point, a CA that is issuing certificates that are being used in MitM attacks is non-compliant with Mozilla's CA Certificate Policy.)