This policy setting controls how often contact information is synchronized between Outlook and connected social networks ...

This policy setting controls how often contact information is synchronized between Outlook and connected social networks (in minutes).  

If you enable this policy setting, you may specify the specified interval (in minutes) in which contact information is synchronized.

If you disable or you do not configure this policy setting, contact information is synchronized at the default interval (once per day, or 1440 minutes).