Email contacts GONE

Just wondering if someone can help me find my email contact list. Ever since our service changed to "Outlook" it has been a nightmare to say the least. Today I wanted to forward some emails and I can't find my contact list anywhere. Before today I could just hit the "NEW" key to start an email and there they were. Just click on the ones I wanted to send too and be done. Now nothing and the instructions that I have been looking at are NO help at all. The page and click on links they describe don't even exist on my page. HELP!!!
PLEASE????

What are you using? Apple mac or PC?