On your BB, do you access OWA through your browser, through the email app, or though another app.
If you get the gmail forwarding, it really does work seamlessly. But I use gmail on my desktop too (not Outlook or other mail app) so everything is synched correctly. And I have the ability to forward my mail from the server, which you probably won't have the ability to do in a corporate environment without IT help.
Without those two, it'll work, but it will be a little hacked together. Also, it works for email only, and not contacts, calendar. Again, I use google for those anyway.