Is there a way to enable the Authetication upon sign up after I have installed and configured the message board?
you have 3 choices for activation in the admin panel/configuration section.
user: registrant gets an email and has to click a link to get activated.
admin: admin gets an email and has to click a link to activate the member.
( be advised, regardless of choice, the registrant's name and info will show in the memberlist right away. )