Classic portal users who are migrating into SAAS are required to migrate their users thru PAPI, however PAPI does not allow to create an user with Initial Password, so the user can login with the initial password after the migration is complete. As of now, the users must receive an activation email, then user has to click the activation link to create new password and then the user will be enabled.
It would be nice for the PAPI to allow the following features as this is crucial for migration of classic portal users:
1. POST Call - Create Users should allow to set initial password
2. POST Call - Create Users should allow to enable the users
Hope this could be implemented soon as there is no migration tool available for SAAS at this point.