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PidTagMessageToken Canonical Property
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Contains an ASN.1 security token for a message.
Secure Messaging Properties
This property conveys protected security-related information from its originator to its recipient. In conjunction with the PR_MESSAGE_SECURITY_LABEL (PidTagMessageSecurityLabel) property, it guarantees the label's association with the message content. In conjunction with the PR_CONTENT_INTEGRITY_CHECK (PidTagContentIntegrityCheck) property, it verifies that the message content is unchanged.