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Go to the Participants Tab (under the course title)
In the pulldown menu labeled Enrolled Users → select Enrollment Methods
Click on the Trash Can icon on the Guest access row
Is Guest Access Enabled?
You can tell whether Guest Access is enabled by checking for the following:
On your Moodle course page, go to the Participants Tab (under the course title)
In the pulldown menu labeled Enrolled Users → select Enrollment Methods
If Guest Access is in the list of Enrollment methods and it is not greyed grayed out (the Eye icon does not have a slash through it), guest access Guest Access is enabled.
If Guest Access is not listed as an Enrollment method or if it is listed but the Eye Icon has a slash through it, Guest Access is not enabled disabled.
If Guest Access is not listed as an Enrollment method it is disabled
Password setting
Follow the instructions above to check on guest access status. Click the Edit button (gear icon) on the Guest Access row to see if a password is set. If the Password field has a series of dots, a password is set.