Hi Mahmoud, It could be due to a misconfiguration of the Microsoft app, especially the Redirect URI (with the correct Oneall subdomain), Implicit flow ticked, Live SDK ticked. Could you double check the settings? Also, we've recently (June 15) fixed an error, which requires you to recreate the windows app if you created it before June 15.
Answers
https://login.live.com/err.srf?lc=1033#error=invalid_request&error_description=The+provided+value+for+the+input+parameter+'redirect_uri'+is+not+valid.+The+expected+value+is+'https://login.live.com/oauth20_desktop.srf'+or+a+URL+which+matches+the+redirect+URI+registered+for+this+client+application.&state=ae6d1b5d-2a4e-482e-8556-d8a3a4fdfd01