After our email server migration to Office 365 in December of 2017, Outlook 2007 and 2010 no longer function with Archdiocese accounts. Outlook 2007 and Outlook 2010 are over 8 years old, and are no longer supported by Office 365 as of October 31, 2017.
For more information, please see this link:
We do not recommend that you continue to use Outlook 2007 or 2010.
Please consider upgrading your version of Outlook to a more modern version.