User Configuration > Administrative Templates > Microsoft Outlook 2016 > Outlook Social Connector
User
HKCU\software\policies\microsoft\office\outlook\socialconnector
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 every 4 days, or 5760 minutes).