Update server 2.0 to 2.5.3

Bear1

I have a few servers version 2.0 that work fine and are really stable, now due to "WARNING: --ns-cert-type is DEPRECATED. Use --remote-cert-tls instead" i really have to update to 2.5.3
Since it can handle both old and new CA at the same time I should be able to keep my clients without changes. But how can I do this update "smoothly", any how-to's are much appreciated.

TinCanTech

Openvpn does not have obscure howto's for such things.

If all else fails then you can contact me privately: tincantech at protonmail dot com (Fees will apply)