If you select the option "Generate random passwords for all users (overwrite existing passwords)," the first option "Generate random passwords for users with no passwords" is automatically selected.
Note In the current release, the cc:Mail Domino Upgrade Service does not support the option "Generate random passwords." To successfully migrate a user's cc:Mail mail box, you must provide a cc:Mail password for the user. Use the cc:Mail administration tool to create passwords for users before migration.