Message containing hyperlink break into two lines after passing through Coexistence Manager for Notes (CMN) Mail Connector when sending message from Notes users to Outlook users:
http://domain.com/domain\prod\username.nsf/0/36D57233BF0B0F5548257CD300304869?openDocument
Change Outbound MIME Conversion option to Message content: from Notes to Plain Text and HTML in the Domino Server Configuration.
Step by step to change the Domino Server Configuration for Outbound MIME Conversion option: