User Configuration > Administrative Templates > Microsoft Outlook 2016 > Account Settings > Exchange ActiveSync
User
HKCU\software\policies\microsoft\office\16.0\outlook\eas
This policy setting allows you to specify the number of minutes that Outlook automatically syncs the users' Exchange ActiveSync (EAS) accounts. If you enable this policy setting, you can specify the number of minutes. If you disable or do not configure this policy setting, Outlook automatically syncs the users’ EAS accounts every 59 minutes.