Computer Configuration > Administrative Templates > Microsoft Office 2016 (Machine) > Licensing Settings
Machine
HKLM\software\policies\microsoft\office\16.0\common\licensing
This policy setting controls whether Office product is activated with the student’s email account. By default, Org Id sign in is not allowed. If you enable this policy setting, student’s email Id sign in will be used to activate the version of Office installed on the computer. If you disable this policy setting, student’s email Id sign in won’t be used to activate the version of Office installed on the computer. Enabling or disabling this policy setting takes precedence over any setting that’s been configured by using the Office Deployment Tool or by manually editing the registry. If you don’t configure this policy setting, student’s email Id sign in won’t be used to activate the version of Office installed on the computer unless you’ve enabled Org ID to sign in by manually editing the registry.