Why does the Live Connect SignInButton fail with an invalid redirect_uri?

Question

I'm experimenting with Windows Phone apps and live connect. I have this control on my main page:

xmlns:live="clr-namespace:Microsoft.Live.Controls;assembly=Microsoft.Live.Controls"

...

<live:SignInButton ClientId="[my client id, which I registered earlier today]"
                   Scopes="wl.signin wl.basic"
                   Branding="Skydrive"
                   TextType="SignIn"
                   SessionChanged="SignInButton_SessionChanged" />

Here is the handler for SessionChanged:

private async void SignInButton_SessionChanged(object sender, LiveConnectSessionChangedEventArgs e)
{
    if (e.Error != null)
        System.Diagnostics.Debugger.Break();

    ...
}

I debug my app using the Windows Phone emulator. When I click the Sign In button, I get this exception:

The provided value for the input parameter 'redirect_uri' is not valid. The client application must be marked as 'mobile' or the value must be an absolute URL which matches the registered redirect URI.

I do not explicitly specify a redirect_uri anywhere. Why does Sign In fail due to an invalid redirect_uri?

Answer 1

You must explicity mark your app as 'mobile' in the Windows Store Dev Center.

1. Open https://account.live.com/developers/applications/ in your browser.
2. Select your app from "My Applications"
3. Click the "Edit Settings" link
4. Click the "API Settings" link.
5. Set "Mobile or Desktop Client App" to "Yes".