OVH, SoYouStart & Kimsufi Reselling WHMCS Module :
For white labeling purpose if you want to hide the OVH name like the below image.
Follow the below steps to update :
Step 1 : Log in to your WHMCS admin Area.
Step 2 : Navigate the Clients Tab >> Click on the View/Search Clients >> Here you will find the list of your clients. Select the client for which you want to modify the services.
Step 3 : Go to client product services and select the OVH VPS services under "Product/Service" and at the buttom you will find the domain name field. Enter the custom domain name which you want to show there.
e.g. follow the below image :
