> my outlook password
Are you referring to the password ***** your email account at outlook.com? If yes, did you try clicking the Forgot Password ***** just under the Sign In button of Outlook.com's logon page?
Please also advise if you have associated your mobil number and/or your 2nd email address with your account at outlook.com?
> It works on my desktop computer, but not on my phone.
You mean you know the correct username and password ***** log on outlook.com using your computer? Or, you just mean you don't need to type any username and password ***** access your email because your browser has remembered the credential?