| Platform SDK: MAPI | 
The PR_EXPIRY_TIME property contains the date and time at which the messaging system can invalidate the content of a message.
| Header file: | MAPITAGS.H | 
| May be exposed by: | Message objects | 
| Identifier: | 0x0015 | 
| Property type: | PT_SYSTIME | 
| Property tag: | 0x00150040 | 
| Corresponding X.400 attribute: | IM_EXPIRY_TIME | 
The PR_EXPIRY_TIME property is used to direct the messaging system in handling delivered interpersonal messages.