User Configuration > Administrative Templates > Microsoft Office 2016 > Security Settings > Digital Signatures
User
HKCU\software\policies\microsoft\office\16.0\common\signatures
This policy setting allows you to specify a requested or desired XAdES level in creating a digital signature. If you enable this policy setting, you may specify the XAdES level in creating a digital signature. If the desired XAdES level is not reached, the last highest XAdES level reached is used if the level is higher than the minimum XAdES level (XAdeES-BES). - No XAdES: XML-DSig - No XAdES - XAdES-BES: Minimal XAdES (Default) - XAdES-T: Will fall back to XAdES-BES if minimum XAdES level < XAdes-T - XAdES-C: Will fall back to XAdES-T if minimum XAdES level < XAdes-C - XAdES-X: Will fall back to XAdES-C if minimum XAdES level < XAdes-X - XAdES-X-L: Will fall back to XAdES-X if minimum XAdES level < XAdes-X-L If you disable or do not configure this policy setting, XAdES-BES will be used.