User Configuration > Administrative Templates > Microsoft Outlook 2016 > Outlook Social Connector
User
HKCU\software\policies\microsoft\office\outlook\socialconnector
This policy setting specifies the minimum interval that Office waits before requesting activity feed information from social networks for a given contact. If you enable this policy setting, Office waits for at least the specified interval before requesting a new activity feed for each contact. If you disable or do not configure this policy setting, Office waits for at least the default interval (60 minutes) before requesting a new activity feed for each contact.