Maybe you haven't created the Personal Digital Certificate
So firstly, Create your Personal Digital Certificate by writing your name in the Digital Certificate dialog box and click OK Now, Sign your macros using your digital certificate just by opening the macro file in the VB Editor (Alt+F11) and then click the Digital Signatures menu item from the Tools menu. And Now hit the Choose button to select a certificate.
Restart your Outlook. Now run the macro. If it doesn't work, update your Trust Center. If your macros still don’t run or work, or there is no any Outlook Security Notice window when trying to run the macro, It just because Trust Center settings are blocking all macros without prior warnings. To check out the setting, hit on the Trust Center menu item from the MS Outlook Tools menu. and then select Macro Security from the left panel and verify your Macro Security.
Now I hope your macro will work
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