Hello Keir,
By MSP, are you referring to a patch?
If that is the case, I'm afraid it might be possible to convert both a MSI and its MSP to MSIX.
EDIT:
Hey guys I might have spoken too soon. After checking it again, it seems that you can repackage a setup with additional packages.
That basically allow you to repackage multiple installers into a single installer, be it a MSIX package or a classic MSI:
- image (2).png (129.56 KiB) Viewed 3022 times
Hope this helps!
Best regards,
Catalin