vBulletinAccess is simple WHMCS module through which you can easily add your WHMCS client to your VB forum located anywhere. New clients will grant access upon signing up with you and your existing client only need to click on vBulletinAccess button under the client area to get access on your VB Forum. After that the client will receive an Welcome email from your VB Forum. This module use real WHMCS client name and the password.
WHMCS 5.x or higher