Set signature verification level

This policy setting allows you to set the verification level used by Office 2016 applications when validating a digital signature.

Note: Enabling this policy setting is not recommended for subscription versions of Office, such as Microsoft 365 Apps for enterprise, because it will use the legacy registry based rules settings (described below) instead of basing the verification level on the Office version that signed the file.

If you enable this policy setting, you can set the verification level to any of the following:

- No rules: Office 2016 digital signature rules are disabled.

- Office 2007 rules: Office 2016 uses the Office 2007 digital signature rules.

- Office 2010 rules: Office 2016 uses the Office 2010 digital signature rules.

- Office 2013 rules: Office 2016 uses the Office 2013 digital signature rules.

If you disable or do not configure this policy setting, subscription versions of Office 2016 use the rules of the Office version that was used to sign the document to validate the digital signature.