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PidTagOriginalSenderSearchKey Canonical Property

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Contains the search key for the sender of the first version of a message, that is, the message before being forwarded or replied to.

Associated properties:




Data type:



General messaging

This property is one of the address properties for the original sender of a message. At first submission of the message, the client application should set this property to the value of the PR_SENDER_SEARCH_KEY (PidTagSenderSearchKey) property. It is never changed when the message is forwarded or replied to.

Protocol Specifications


Provides references to related Exchange Server protocol specifications.


Specifies the properties and operations that are permissible on e-mail message objects.

Header Files


Provides data type definitions.


Contains definitions of properties listed as alternate names.