Computer Configuration > Administrative Templates > Microsoft Office 2016 (Machine) > Security Settings
Machine
HKLM\software\policies\microsoft\office\16.0\common\openxmlformat
This policy setting lets you disable the option to repair Open XML documents. If you enable this policy setting, Office 2016 prevents applications from performing a repair on corrupted Open XML documents. If you disable or do not configure this policy setting, when an Office 2016 application detects that an Open XML document has been corrupted, the user is given the option of repairing the corrupted document.