3.1.5.7 Sending a RopSetMessageStatus ROP Request
The client uses the RopSetMessageStatus ROP request ([MS-OXCROPS] section 2.2.6.8) to set the value of the PidTagMessageStatus property (section 2.2.1.8). Additionally, the PidTagMessageStatus property can be set as a column on a contents table, as specified in [MS-OXCTABL] section 2.2.2.2.
To modify 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 RopSetMessageStatus ROP request ([MS-OXCROPS] section 2.2.6.8), setting the mask and status appropriately.