This policy setting controls when background synchronization occurs while operating in slow-link mode and applies to any user who logs onto the specified machine while this policy is in effect. To control slow-link mode use the "Configure slow-link mode" policy setting.If you enable this policy setting you can control when Windows synchronizes in the background while operating in slow-link mode. Use the 'Sync Interval' and 'Sync Variance' values to override the default sync interval and variance settings. Use 'Blockout Start Time' and 'Blockout Duration' to set a period of time where background sync is disabled. Use the 'Maximum Allowed Time Without A Sync' value to ensure that all network folders on the machine are synchronized with the server on a regular basis.You can also configure Background Sync for network shares that are in user selected Work Offline mode. This mode is in effect when a user selects the Work Offline button for a specific share. When selected all configured settings will apply to shares in user selected Work Offline mode as well.If you disable or do not configure this policy setting Windows performs a background sync of offline folders in the slow-link mode at a default interval with the start of the sync varying between 0 and 60 additional minutes. In Windows 7 and Windows Server 2008 R2 the default sync interval is 360 minutes. In Windows 8 and Windows Server 2012 the default sync interval is 120 minutes.