User Configuration > Administrative Templates > Microsoft Office 2016 > Contact Card
User
HKCU\software\policies\microsoft\office\16.0\common\im
This policy setting allows you to turn off instant messaging (IM) presence integration for Microsoft Office applications. If you enable this policy, setting IM presence icons will not be displayed and presence integration will be turned off for Office applications. If you disable or do not configure this policy setting, IM presence icons will be displayed and presence integration will be turned on for Office applications.