Moodle User Batch Creation

We have successfully converted SIS user information and loaded to Moodle through batch user creation interface. However, one of the option is to enable New Password generation that triggers an email to the users. Since we have 25000 users in the batch, it created a email storm.

One lesson learned was that Also, Moodle uses an asynchronized process (cron job) to generate new password and emails that querys the database to create a recordset of users for new password generation.