The attributes of the class OMP_O_IM_C_NON_RECEIPT_NOTIF map to MAPI properties (when PR_NON_RECEIPT_NOTIFICATION_REQUESTED = 1 in Recipient table or when the message has PR_READ_RECEIPT_REQUESTED = 1), as follows:
The following constant values are mapped from IM_DISCARD_REASON to PR_DISCARD_REASON:
The following constant values are mapped from IM_NON_RECEIPT_REASON to PR_NON_RECEIPT_REASON: