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Error when running macros that are assigned a Digital Signature certificate in Outlook: The macros in this project are disabled

  • Applies to: Outlook 2016, Outlook 2013, Microsoft Outlook 2010

Original KB number:  4465120

Symptoms

Considering the following scenario:

  • You set the Macro Security to Notifications for digitally signed macros, all other macros disabled on the Developer tab in Microsoft Outlook.
  • You create a macro and assign a Digital Signature certificate to the macro under Tools > Digital Signature in Visual Basic.
  • You close Visual Basic and Outlook. When you're prompted to save the Visual Basic project, you click Yes.
  • You start Outlook, and then you start Visual Basic.

In this scenario, you receive the error message: An error occurred while attempting to verify the VBA project's signature. Macros will be disabled.

When you try to run the macro, you receive the error message: The macros in this project are disabled. Please refer to the online help or documentation of the host application to determine how to enable macros.

Cause

This issue occurs because exiting Visual Basic effectively cancels the changes that you made to the project, so the certificate is no longer assigned to the macro.

Resolution

Manually save the changes that you made to the project before you close the Visual Basic window by using either of the following methods:

  • Go to File > Save VbaProject.OTM.
  • Click the Save icon on the toolbar in the Visual Basic window.