I've just create a user at virtualmin. This user was in another system and I don't know his password. When I create it using virtualmin I assigned a temporal password, and after that, I copy the system crypted password from one system to the new system with virtualmin. When the user try to access his email vía usermin read mail module, it's not possible to view mails with a message:
"An error occurred listing mail in this folder : Failed to login to POP3 server : Authentication failed."
If the user change his password via usermin, there isn't problem. But this solution is not so good, because I need to migrate several users from the old system to new virtualmin system.
Any suggestions are welcome Thanks in advance. Regards.