WHMCS Joomla Bridge gives you the ability to share user logins – any user logged in to WHMCS will also also login to the Joomla site.
Keep in mind that the WHMCS will always be the *master* site.
To enable user share logins, please set the following –
On your WHMCS admin panel, navigate to “Addons” -> “Server Joomla Bridge” -> “Settings” tab.
Set “Users Synchronization” to “YES“.
On your Joomla site, navigate to “Components” -> “Server Bridge” -> “Settings” -> “Users Login Enabled“, set to YES.