User Configuration > Administrative Templates > Microsoft Outlook 2016 > Outlook Options > Preferences > Junk E-mail
User
HKCU\software\policies\microsoft\office\16.0\outlook\options\mail
This policy setting allows you to trigger the activation of other junk e-mail policy settings. If you enable this policy setting, you will trigger the activation of other junk e-mail policy settings. For example, if you configure the "Specify path to Safe Senders list" policy setting, the specified Safe Senders list is not imported by Outlook unless you also enable the "Junk Mail Import List" policy setting. If you disable or do not configure this policy setting, you will not trigger the activation of other junk e-mail policies.