You can use Mail, the Windows 8 Mail app, to access your Office 365 or Exchange-based email account by using your email address and password. The Windows 8 Mail app is built in to Windows 8 and Windows RT.
The following links will assist you in setting the Windows 8 Mail email clients. Please note, all of these links point to instructions on Microsoft's web site. As updates are made to Office 365, these instructions will also be modified to show the most up to date information. The same is true if your Outlook client is upgraded. If you experience problems connecting your system to Office 365, you may want to check this site to see if changes are required in the setup for your computer.
The instructions above should get your system connected Windows 8 Mail. Should you want more detailed information, it is available from Microsoft at What else do U need to know.