When the Delta Resource Membership update schedule is run it quickly fails and aborts, returning an error similar to the following which is found in the NS logs.
Module: w3wp.exe
Source: Altiris.NS.StandardItems.Collection.DeltaCollectionUpdateScheduleDescription: Error occurred during delta collection updating: Altiris.NS.Exceptions.AeXException: Error retrieving Collection Last Run Date or it has an invalid format. Value '1434-08-14 09:59:19.000', Format 'yyyy'-'MM'-'dd HH':'mm':'ss' ---> System.FormatException: String was not recognized as a valid DateTime. at System.DateTimeParse.ParseExact(String s, String format, DateTimeFormatInfo dtfi, DateTimeStyles style) at Altiris.NS.StandardItems.Collection.DeltaCollectionUpdateSchedule.get_LastRunDate() --- End of inner exception stack trace --- at Altiris.NS.StandardItems.Collection.DeltaCollectionUpdateSchedule.get_LastRunDate() at Altiris.NS.StandardItems.Collection.DeltaCollectionUpdateSchedule.OnSchedule_Impl()ITMS 8.x
<customSetting key="DeltaCollectionUpdateLastRunDate" type="local" value="1434-08-14 09:59:19.000" />