Hi,
First, you need to create the MSI/EXE installer for the application, as I assume you still want to have it deployed as a desktop application for some users. For this you have multiple tutorials:
http://www.advancedinstaller.com/user-g ... ls-qa.html
After you have create this installer go to Builds page in Advanced Installer and
create a new UWP build. This by default will contain all the resources from the project. At build time, the installer will notify you which resources, if any, from the application are not supported in a UWP application.
The final AppX package generated by Advanced Installer is valid and can be taken in the store, but if your application installs a service, this will not be included in the package, so your application will not run.
Check the list from Microsoft for
UWP advantages and limitations. In a future version of Advanced Installer we will include automatic checks for many of these limitations, for now you need to manually check them.
Also, we recently discovered and Microsoft confirmed to us, that registry entries you have under HKCU are not going to be included in the AppX packages. Only those under HKLM will be included. Microsoft hasn't confirmed if this is a bug or limitation yet, probably we will get more details on this in a future update.
Regards,
Bogdan