Outlook 2010, How to have all emails go into 1 folder?

Hi, I have several different email accounts for work, and I am new to 2010 outlook. I was previously using 2003. and in 2003, all of my email addresses came into ONE main in box. now, in 2010, the way it is set up, each email address has its own inbox and emails are filtered into the appropriate one. nothing goes into the "main" inbox under personal folders. i really need them all to go into one...is this possible and if so, how do i do it? many thanks!!!