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The expiryTime value of thresholdEvents is the maximum of 365 days and the DEFAULT_EXPIRY_DAYS setting. There is also a eventExpiryTime in the ThresholdGroups.xml
Expiry time for Forecaster Notes
Forecaster notes have a default expiry time of 5 days. This can be overrules on event code in the ForecasterNotesDisplay.xml file.
<eventCode id="Comms"><expiryTime unit="day" multiplier="10"/></eventCode>
MCRolling barrel extends expiry times for SystemActivities, Tasks and TaskRuns when necessary (2017.01 and later)
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