If your "servers" are communicating directly with APNs, you will need to have this new root certificate in your Trust Store.
We wouldn't know if your host does or will automatically update the servers with new root certificates or not. This is something you would need to ask them.
If they are not, then it is your responsibility to add the new root certificate.
Unfortunately we cannot provide specific instructions on how to install this root certificate on your push servers. Each server operating system and push server software will have different ways these root certificates are installed, which is out of scope of our support abilities.
If you are not sure how to do this, I would recommend you seek help for this from your server-side developers or server admins. Or, if you don't have access to such resources, you can ask the support channels for your system the question: How do I install a root certificate?
Argun Tekant /
DTS Engineer /
Core Technologies