Hi Steve,

Based on your description, I understand that you added your domain to Office 365 and want to set up your Office 365 email account in your Outlook client.

If so, please refer the link below to setup your email in Outlook:

For Outlook 2010: http://help.outlook.com/en-us/140/dd253202.aspx?sl=1

For Outlook 2007: http://help.outlook.com/en-us/140/cc511396.aspx

In addition, you need to set up your desktop before you can set up Outlook. For more detailed information, please refer Set up your desktop for Office 365.

If there are any questions, please feel free to post in forum.

Thanks,
Jolin Qiao