User Configuration > Administrative Templates > Microsoft Office 2016 > Subscription Activation
User
HKCU\software\policies\microsoft\office\16.0\common\licensing
This policy setting controls whether a "Manage Account" link is exposed in Account tab of the File menu for subscription licenses. If you enable this policy setting, Office does not expose a "Manage Account" link for subscription licenses. If you disable or do not configure this policy setting, Office exposes a "Manage Account" link for subscription licenses.