220.127.116.11 Sending a RopSetProperties ROP Request
Depending on the type of Attachment object being created by sending the RopSetProperties ROP request ([MS-OXCROPS] section 18.104.22.168), the client sets the appropriate value for the PidTagAttachMethod property, as specified in section 22.214.171.124.
The client sends a RopSaveChangesAttachment ROP request ([MS-OXCROPS] section 126.96.36.199) to commit the change to the Attachment object and a RopSaveChangesMessage ROP request to commit the Attachment object change to the Message object.
To set the PidTagMessageStatus property (section 188.8.131.52), the client does not include it in a RopSetProperties ROP request ([MS-OXCROPS] section 184.108.40.206), as specified in [MS-OXCPRPT] section 2.2.5. Instead, the client calls the RopSetMessageStatus ROP ([MS-OXCROPS] section 220.127.116.11), as specified in section 18.104.22.168.