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The expiryTime value of thresholdEvents is the maximum of 365 days and the DEFAULT_EXPIRY_DAYS setting.
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2017.02 MCRolling barrel extends expiry times for SystemActivities, Tasks and
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TaskRuns when necessary
In 2017.01 and later, the MC RollingBarrel component will extend the expiryTime of system activities and tasks when the rows are almost expired and there is still forecast data attached.
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