This policy setting defines the interval (in minutes) in which Outlook automatically updates SharePoint folders. If present, ...

This policy setting defines the interval (in minutes) in which Outlook automatically updates SharePoint folders.  If present, the Sharepoint server's synchronization limits will always override this policy.If you enable this policy setting, you can specify the interval (in minutes). If you disable or do not configure this policy setting, Outlook automatically updates SharePoint folders every 20 minutes.