Forum Discussion
MSIX package signing issue with certificate installed in a certificate store
I created a MSIX file and later signing the package with this command signtool sign /fd SHA256 /v /sm /s My /n "ABC Corporation" /t http://timestamp.digicert.com file.msix But signing failed wit...
If the Digicert utility doesn't recognise .msix, you can try renaming the file to .appx and then sign it. Ultimately I assume this utility is calling the Microsoft signtool.exe utility to perform the signing.
There is no difference on the file extension; the difference between a UWP app and a MSIX one is internal to the manifest file rather than the file name extension.
You might also just leave the timestamp off for a test and make sure that it is not the cause.