There is no Exchange to Domino migration application - the primary problem is DUC does not allow for automatic creation of users and has no mechanism for extract/insert messages by a remote process (i.e. as DiRT and FullDBImport/Export requires).

You can export CSV infromation for top level subscriber data (extension, transfer number etc...) and use the Cisco Unity Database Import tool for Domino to import top level subscriber data but there's no mechanism for bringing over audio text applications, greetings or messages in that scenario.