Copy down the settings from Outlook (server names, etc.), then transfer
that information to a new account in Windows Mail. However, be aware
that if both computers are checking the same email account, whichever
one completes its email download first will make those emails
unavailable to the second PC. To fix that problem, go to Tools,
Accounts, select your mail account, Properties, Advanced,
select "Leave a copy of messages on server."
Repeat the above on your office computer, but I don't know the exact
menu path in Outlook..