Best way to mass assign portal user accounts?

Question

Hi everyone. 
 We are starting to use the Sugar Portal for case management. But we have 40,000 contacts in the system, most of which will need to be setup with a portal login. 
 Is there any way to mass automate the signup process? We do not allow them to register on the site (as they typically already have a contact) but would need to assign them a username/password. 
 Thanks!

Enrico Simonetti · Answer

Daniel Hill , 
 an alternative to not set a temporary password could be: 
 
 Enable the contact(s) as portal user(s) and set their unique username and correct email address(es) - through the api 
 Send all the contacts an email externally from Sugar, telling your customers to set their password (with the provided username and email address) 
 They set the password themselves whenever they feel appropriate 
 
 Hope it helps

Vincent Amari · Answer

is this CRM instance using LDAP? 
 if so, I believe it will prevent forgotten password feature