MSOE email addresses are a combination of your last name and first name. So "firstname.lastname@example.org" is most likely your email address.
I recommend setting up your MSOE email by going to "https://my.msoe.edu" and clicking "Webmail Access" in the Quick Link section (lower left side of the screen). When I set my email up last year, our default password was a combination of our student ID # and our birthdate. I don't know what the default password is for this year so I think calling the IT department might be a good move. They would be more helpful than me.
The phone number for the IT department is (414)277-7288.
I wish I could help more but that's all I know. Hope it helps!