Outlook synchronization on PC and Laptop

I am wondering if there is some way in which I can link outlook to both my pc and laptop such that I am able to view my mails from both machines. This would be convenient as I can carry my laptop around. I have tried to do this but whenever I try to enter my account details in the account setting I get a message stating that the “account already exists” instead of a Microsoft account that I have one from yahoo.
I have tried asking a number of people how to do this but I haven’t found the solution yet so I am hoping that you might help.
