Integration Server 10.5 | Web Services Developer’s Guide | Securing Web Services Using the WS-Security Facility | WS-Security Facility Policy Reference | Timestamp Element for Outbound Messages
 
Timestamp Element for Outbound Messages
The <Timestamp> element supplies settings to enforce message expiration.
For outbound messages, the presence of this element generates a timestamp with a specified “time to live” value. You can increase the precision of the value by specifying milliseconds.
The default value is 5 min (300 sec).
Example
<Timestamp
TimeToLiveInSeconds="300"
IncludeMilliseconds="True"/>