2.1.3.2.17 Classification Properties

To generate headers related to message classification, clients both set the value of the PidLidClassified property ([MS-OXCMSG] section 2.2.1.25) to TRUE and set the values of the following properties: PidLidClassification ([MS-OXCMSG] section 2.2.1.23), PidLidClassificationDescription ([MS-OXCMSG] section 2.2.1.24), PidLidClassificationGuid ([MS-OXPROPS] section 2.54), and PidLidClassificationKeep ([MS-OXPROPS] section 2.55).

When the value of the PidLidClassified property is TRUE, MIME writers SHOULD<43> copy all classification property values to their corresponding headers, as specified in the following table. If the value of PidLidClassified is FALSE, no value is written for any of the five headers listed in the following table.

Classification property name	Classification header name	Property value mapping
PidLidClassified	X-Microsoft-Classified	TRUE maps to "true". If the value of PidLidClassified is FALSE, then there is no header.
PidLidClassificationKeep	X-Microsoft-ClassKeep	TRUE maps to "true". FALSE maps to no header.
PidLidClassification	X-Microsoft-Classification	No mapping. The string value is copied directly.
PidLidClassificationDescription	X-Microsoft-ClassDesc	No mapping. The string value is copied directly.
PidLidClassificationGuid	X-Microsoft-ClassID	No mapping. The string value is copied directly.