Outlook uses certificates in cryptographic email messaging to help keep communications secure. You can view your own certificates or those that you receive in email messages.
View your certificates
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On the File tab, click Options.
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In the left pane, click Trust Center.
In the right pane click Trust Center Settings.
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In the left pane, click Email Security.
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Under Encrypted e-mail, click Settings.
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Under Certificates and Algorithms, click Choose.
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Click the certificate that you want, and then click View Certificate.
View certificates on received messages
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In the email message, click
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Click Details.
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Click Signer or Encryption Layer, and then click View Details.
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To see details about the certificate, click View Certificate.
