Visual Studio adding Signatures (Selfcerts) to applications to run in Excel
Self Cert: Office 365 32-bit (Subscription based or Click-to-Run version of Office 2016 / 2019) C:\Program Files (x86)\Microsoft Office\root\Office16 Office 365 64-bit (Subscription based or Click-to-Run version of Office 2016 / 2019) C:\Program Files\Microsoft Office\root\Office16 From: https://docs.microsoft.com/en-us/visualstudio/deployment/how-to-add-a-trusted-publisher-to-a-client-computer-for-clickonce-applications?view=vs-2019 To add a certificate to the Trusted Publishers store under the trusted root Obtain a digital certificate from a CA. (WE are using a self cert) n windows - search for "Manage user certificates" or "Certificates" Export your selfcert: Suggest dumping it in your CODE folder. Export the certificate into the Base64 X.509 (.cer) format. For more information about certificate formats, see Export a certificate. search for CMD from the start menu - right click and run as administrator Locate certmgr.exe