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2.2.1.2.7 PidTagChangeKey Property

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Data type: PtypBinary ([MS-OXCDATA] section 2.11.1)

The PidTagChangeKey property ([MS-OXPROPS] section 2.631) contains a serialized XID structure, as specified in section 2.2.2.2, that identifies the last change to the messaging object.

If the last change to the messaging object was imported from the client by using the RopSynchronizationImportMessageChange ROP (section 2.2.3.2.4.2), the value of the PidTagChangeKey property that is saved to the message store by the server contains the value for the PidTagChangeKey property that was passed in the PropertyValues field of the RopSynchronizationImportMessageChange ROP request buffer.

If the last change to a messaging object was made by the server, the value of the PidTagChangeKey property that is saved to the message store by the server contains an XID generated from the PidTagChangeNumber property (section 2.2.1.2.3). For more details about generating XIDs based on internal identifiers, see section 3.1.5.3.