3.1.5.8 Sending a RopGetMessageStatus ROP Request
The client uses the RopGetMessageStatus ROP request ([MS-OXCROPS] section 2.2.6.9) to obtain the value of the PidTagMessageStatus property (section 2.2.1.8).
To retrieve the status of a header message object, clients:
Obtain the message's MID ([MS-OXCDATA] section 2.2.1.2), as specified in section 3.1.5.1.
Send the RopGetMessageStatus ROP request; if the request succeeds, the value of the header message object's PidTagMessageStatus property ([MS-OXPROPS] section 2.799) is returned in the response buffer.