Excel® 2013 On Demand

Adding a Digital Signature to a Macro Project

If you want to add a digital signature to a workbook with a macro, you need to add it using the Visual Basic editor. If you open a workbook that contains a signed macro project with a problem, the macro is disabled by default and the Message Bar appears to notify you of the potential problem. You can click Enable Content in the Message Bar to use it. For more details, you can click Show Signature Details to view certificate and publisher information. If a digital signature has problems—it’s expired, not issued by a trusted publisher, or the workbook has been altered—the certificate information image contains a red X. When there’s a problem, contact the signer to have them fix it, or save the workbook ...