User Configuration > Administrative Templates > Microsoft Office 2016 > Security Settings > Trust Center
User
HKCU\software\policies\microsoft\vba\security
This policy setting allows you to control how Office loads and verifies legacy Visual Basic for Applications (VBA) signatures. If you enable or do not configure this policy setting, Office applications can load and verify legacy VBA signatures. If you disable this policy setting, Office applications can’t load or verify legacy VBA signatures. They can only load and verify agile VBA signatures.