How to use microsoft outlook express in my omnia pro 7320

[nitrous9200]

I think you're trying to set up email on your phone, in which case you would go to the Messaging application and set up a new email account (you'll see it when you open up Messaging). Then you just put in your email address, and if it doesn't already have the settings, it will ask you for them (server details, authentication, user and password etc). Outlook Express is an old, out of date email client for Windows XP, you don't install it on your phone.