If you copy a document, template, or workbook containing a macro project that has been
digitally signed with a self-generated certificate, you’ll be unable to open any of those
macros on another computer. Windows protests that it can’t authenticate the certificate and
thus gives you only the option to disable the macros and open the document.
Are you stymied? Not at all. If you’re absolutely, positively confident of the identity of the
party who created the macros—for instance, if you created and signed them yourself on one
computer and you want to use them on another computer in the same office—you can tell
Windows that you ...
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