Yeah, I get it, just saying stop worrying and learn to love the bomb - use office.com. If you want to get to outlook use outlook.office.com. If you want to use Forms (and have a license for it) use forms.office.com.
Like I said in my comment, forms.office.com doesn't work. Going to forms.office.com redirects you to login.live.com where you cannot login with a business account. But outlook.office.com works. That inconsistency is the problem.
