With the Sun migration tool, there is no need to discover or “hack” user passwords, change them, or require users to change their passwords after the migration. Additionally, the migration tool itself does not need to know the passwords to accomplish its work.
Sun estimates that upwards of 50 percent of a company's internal support calls involve user passwords. Forcing users to change passwords as part of a migration strategy would severely impact a company's help desk. This would also have many other potentially harmful side effects, as passwords can be used in other areas, such as for single sign on access and for batch processing.