I have an application published on Microsoft Store and I wanted to update it recently but when I submitted it resulted in an error:
Your submission does not have a valid code signing certificate.
On June 16, 2022 we announced an update to Store policy. Win32 apps are required to be digitally signed, with a code signing certificate that chains up to a certificate issued by a Certificate Authority (CA) that is part of the Microsoft Trusted Root Program.
New app submissions will not be allowed without an appropriate signature after May 1, 2023. Existing apps must be updated to include a digital signature per this policy before January 15, 2024.
Previously, all Microsoft Store apps (native UWPs for example) were hosted and signed by the Microsoft Store and received a Microsoft signature. With the change to our policy enabling Win32 apps to be listed in the Microsoft Store, and the removal of the waitlist for submitting Win32s, the new policy requires those apps to be digitally signed, and ensures all apps that customers acquire and download from the Microsoft Store have a trusted digital certificate.
So I looked into it and all the answer I found was from 10 years ago. If anyone has any knowledge about this issue, How do I get a valid certificate? Where do I get a valid certificate? How do I sign my Win32 App and its .msi Installer? My application is made in WPF and The Installer is a "Setup Project" by an extension for Visual Studio by Microsoft.