I need to import a large number of users from Exchange to Zimbra 6. The exchange migration wizard works well. I would like to migrate the users in batches. I notice that when one "re-syncs" the data, the log file (m2l.log) is referenced. When a new migration is done, the log file is overwritten. What is the best way to migrate multiple batches and still preserve the ability for the "re-sync" to reference the initial log? Should I simply backup the entire contents of ..Local Settings\Temp\ZCSExchangeMigrationWizard-6.0.5_GA_2070\ dir and restore it when I need to do the resync for that particular batch?