This feature allows users with root access to assign an IPv6 address to a specific account. IPv6 addresses that were assigned without this feature will be erased for the selected users when you enable IPv6 with this feature. Hold shift and click on an account name to select or deselect multiple accounts. Click the blue asterisk to select all accounts.
You have not configured a shared IPv6 address. To do this, use the Basic cPanel & WHM Setup interface.