Issue publishing App to ISS server

JohnMcC1983 

First the bad news, then the not usable news, then the good news.

Bad news: Microsoft disabled the appinstaller protocol handler by default due to a security incident.

Not usable news: As noted in the update to this post https://techcommunity.microsoft.com/t5/windows-it-pro-blog/disabling-the-msix-ms-appinstaller-protocol-handler/ba-p/3119479 , you can download a file to change this default policy and use it to set a "local policy" (not GPO). But as the policy is a local policy it has to applied to the end-user system before you can use the external appinstaller file, so you might not be able to use this.

Good news. You can now include the appinstaller file inside your package and just publish the MSIX file on the IIS server and they will get the updates. This is documented on this link: https://learn.microsoft.com/en-us/windows/msix/app-installer/how-to-embed-an-appinstaller-file

IMPORTANT!!!!!

If you choose to use the appinstaller file inside the package and you are making the package available outside of your company, PLEASE post two copies of the package, one with the AppInstaller file and one without it and let the customer choose whether or not to get updates automatically.  Most large companies want to control the flow up updates on all applications.