To Access a User’s cPanel Account
1. Log in to your root account of WHM.
2. Select the Account Information option from the navigation menu.
3. Click on List Accounts.
A list of all active cPanel user accounts will appear.
4. Go to the user account you want to access and click the cPanel icon in front of it.
The cPanel of the user account will open where you can freely customize its settings.
You can use this method to open/access any cPanel account under your WHM root.