If you want to replace the old values in the synchronization parameters with new values, clear the previous synchronization parameter values before retrieving data from an MBO during a synchronization session.
CustomerSynchronizationParameters sp = Customer.SynchronizationParameters; sp.Delete(); sp = Customer.SynchronizationParameters;//Must re-get synchronization parameter instance. sp.Cityname = "New City"; sp.Save(); SUP101DB.Synchronize();