HP LaserJet Enterprise MFP - CA Certificates for commercial Email services (white paper)

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4) In the Certificates details page, click on the Root CA certificate or self-signed certificate
(Certificate is self-signed), the last certificate in the Certificate chain.
Figure 3: Certificate chain
5) On the DigiCert High Assurance EV Root CA page, select the self-signed certificate and
download the PEM format.
The PEM format is the certificate required to validate the SMTP server.
Figure 4: Certificates