Macro security in Outlook 2007 gives you control over when macros can run, which helps prevent malicious code from affecting an Outlook 2007 user’s system. When macro security is set to Warnings For Signed Macros; All Unsigned Macros Are Disabled in Outlook 2007, only digitally signed macros from trusted sources can run. A setting of Warnings For All Macros causes Outlook 2007 to prompt you whether to enable and allow macros to run. A setting of No Security Check For Macros allows all macros to run, which poses significant risks from malicious code.

If you create your own macros, you probably would like to digitally sign your macros so that they will run on other people’s computers without triggering Outlook 2007 macro security warnings. Outlook 2007, like all versions since Microsoft Outlook 2000, provides the means to sign VBA projects.

To create a self-signing certificate, follow these steps:

To sign a macro, follow these steps:

On the computer that will be running the macro, verify that you have configured Outlook 2007 macro security for either Warnings For Signed Macros; All Unsigned Macros Are Disabled or Warnings For All Macros settings, and then attempt to run a macro. When Outlook 2007 asks whether you want to trust the macro publisher, click Yes. Your custom macros should now run on that computer without triggering the Outlook 2007 security warnings.