Not clear exactly what you mean. Outlook is Outlook on any operating system. If you're trying to say that Outlook Express is now called Windows mail then you'll need to set up the account manually i think.
Go into accounts on your Outlook Express and copy all the details of your servers down exactly including every dot and create a new account in Windows mail with these settings. They'll look the same more or less in Windows mail, it's not too different, it just based on Microsoft Outllook rather than Outlook Express