Troubleshoot modifying the list of trusted sources for macros

I can't add a macro developer to the list of trusted sources.

The source of the certificate I chose to trust was not added to the list of trusted sources.

If you use Microsoft Internet Explorer version 4.0 or later, the Certificate Properties dialog box appears when you click the Details button in the Security Warning dialog box. The Trust tab in the Certificate Properties dialog box provides an option to trust the certificate; however, Microsoft Office XP programs will ignore any options you set on the Trust tab. Use the Security Warning dialog box to add a macro developer to the list of trusted sources.

I signed my macros with a digital certificate that I created myself, but other people are unable to use them and they can't add me to their list of trusted sources.

Digital certificates created with the Selfcert.exe tool are considered unauthenticated. Microsoft Office XP will allow you to add the owner of an unauthenticated certificate to the list of trusted sources only when the certificate is used on the same computer on which it was initially created. This means you can run Selfcert.exe and create a certificate on your computer, sign your own personal macros, and you can trust that certificate on that same computer. However, if you attempt to share the file with another user, the other user will be unable to run the macros if his or her security setting is set to High.