WALNUT CREEK, Calif.--(BUSINESS WIRE)--Arch Mortgage Insurance Company (“Arch MI”), a leading provider of private mortgage insurance and wholly owned subsidiary of Arch Capital Group Ltd., today announced two new improvements to its ArchMIConnectSM Origination user interface: an updated configuration that allows customers to navigate the site more easily and the introduction of a “Live Support via Chat” feature that provides real-time customer communication. The redesign of ArchMIConnect Origin