PLEASE HELP! Here is the way I configured the Self enrollment Plug in Setting page.
Require enrolment key in new courses and prevent removing of enrolment key from existing courses.
Use standard password policy for enrolment keys.
Show first letter of the guest access key.
Enrolment instance defaults
Default enrolment settings in new courses.
It is possible to add this plugin to all new courses by default.
Allow users to self enrol into course by default.
Use group enrolment keys by default.
Select role which should be assigned to users during self enrolment
Default length of time that the enrolment is valid (in seconds). If set to zero, the enrolment duration will be unlimited by default.
If users haven't accessed a course for a long time, then they are automatically unenrolled. This parameter specifies that time limit.
Specifies the maximum number of users that can self enrol. 0 means no limit.
If enabled, users receive a welcome message via email when they self-enrol in a course.