Office Digital Certificates for Code Signing VBA Macros (97-2003) are no longer available as they are outdated technology. Office Digital Certificates were used to digitally sign Office documents that contain macros, and to authenticate the identity of the macro developer. These certificates were issued by Microsoft, and were used in Office versions 97-2003.
As of Office 2010, Microsoft has replaced the use of Office Digital Certificates with the use of trusted locations and the Trust Center in Office. This means that VBA macros in Office 2010 and later versions are not signed with digital certificates, but are instead trusted based on their location on the user's computer or network.
It's important to note that Microsoft no longer issues Office Digital Certificates for Code Signing VBA Macros and it is not recommended to use VBA Macros in Office 97-2003 as it poses security risk.
Instead, you can use Office's built-in macro security features or use a third-party macro security solution to secure your macros and protect your users from malicious macros.
It's recommended to use the latest version of Office and create macros that are signed using Authenticode technology, this will provide the highest level of security.