Reset user choice for windows.protocol tel:
Hi everyone, we ship an MSIX that registers a full-trust Dialer.exe as a windows.protocol handler for tel: so users can place calls from Outlook etc. Goal After installing our MSIX, we’d like Windows to show the “How do you want to open this?” prompt again for tel: so users see the new option. With our old MSI this was easy, we deleted HKCU\Software\Microsoft\Windows\Shell\Associations\UrlAssociations\<protocol>\UserChoice via the manifest entry: <RemoveRegistryKey Id="WipeDialerOnInstall" Root="HKCU" Key="SOFTWARE\Microsoft\Windows\Shell\Associations\UrlAssociations\tel\UserChoice" Action="removeOnInstall"/> Problem With MSIX there seems to be no manifest option to mimic that. We tried deleting UserChoice on first app start (HKCU, RegDeleteTree/SHDeleteKey), but it did not work. Questions Is there any supported or recommended way to trigger the default-app prompt (or clear the choice) for a specific protocol when using MSIX? Is deleting UserChoice from a full-trust MSIX app considered supported/allowed for Store submissions? Any guidance or stance appreciated! Thanks!