When the Delta Resource Membership update schedule is run it quickly fails and aborts. An error similar to the following (excerpt) is found in the NS logs.
Module: w3wp.exe
Source: Altiris.NS.StandardItems.Collection.DeltaCollectionUpdateSchedule
Description: 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()