Vision Helpdesk Integration with WHMCS to override WHMCS default support module.
Follow below listed steps --
1) Copy folder vision from - integration/whmcs/modules/support/ to WHMCS installation -- /modules/support/
2) Copy config.php file from vision installation to /module/support/vision/ directory of WHMCS Installation.
example : If you have installed Vision at yourdomain.com/support/ then you should find config.php under "support" folder
3) Edit above mentioned config.php file in whmcsinstallation/module/support/vision/
Locate line -- $this->database = "";
Below this line add one more line --
$this->domain = "yourdomain.com";
Where yourdomain.com == your Vision License Domain.
4) Copy the vision directory from integration/whmcs/templates/ to templates directory of WHMCS Installation.
5) In WHMCS admin, navigate to General Configuration >> Support and choose Vision in the Support Module drop down.
That's it. You are done
After Integration if you see blank pages for submitticket.php etc that means you did not upload integration files in BINARY format.