Click on the link and it will download SmimeOutlookWebChrome.'This message has a digital signature, but it wasn't verified because the S/MIME control isn't installed.Open an email that's signed, Now you will receive a different message:.
deny the existence of encrypted data, for example during border controls. Please contact your IT administrator for help installing the extension.' This message has a digital signature, but it wasn't verified because the S/MIME extension isn't installed.
