I'm building a WinRT CLI wrapper in C# that checks if a user owns an active Microsoft Store subscription add-on. This CLI is called from an Electron + React.js app using command-line arguments and returns true or false depending on the license status.

Problem

The CheckSubscription command incorrectly returns false, even though the logged-in user does have an active subscription to the add-on.

Below is the code snippet

private static async Task HandleCheckSubscriptionCommand(string[] args)
{
    string addonId = args[1];
    var context = StoreContext.GetDefault();
    var license = await context.GetAppLicenseAsync();

    foreach (var kvp in license.AddOnLicenses)
    {
        var addOnLicense = kvp.Value;
        if (addOnLicense.SkuStoreId.Equals(addonId, StringComparison.OrdinalIgnoreCase))
        {
            bool isValid = addOnLicense.IsActive && addOnLicense.ExpirationDate > DateTimeOffset.UtcNow;
            Console.WriteLine(isValid ? "true" : "false");
            return;
        }
    }

    Console.WriteLine("false");
}

What could cause GetAppLicenseAsync() to return a subscription license as inactive or missing, even though the user has purchased it through the Store?

I've also done the following:

• MSIX-packaged CLI app (Windows 10+), wrapper is included and succesfully ran by application
• Published to Microsoft Store (delisted for testing)
• Using StoreContext.GetAppLicenseAsync()
• Subscription add-on is published and testable
• The add-on ID resolves correctly via the API