Is it possible to add a client certificate to existing sync accounts?

Hi,

I’ve been testing client certificates as an extra security layer, which works when i access my nextcloud installation via the webbrowser. How can I add this client certificate to my existing sync accounts in the (windows) desktop client? The client asks for one when you create a new account, but i think it should also ask for one in existing accounts. Especially since these certificates can change (new ones issues, expirations, revokations, etc).