I have a local network with a SBS2011 and Exchange 2010 server with a bunch of mixed Windows clients.
The exchange certificates expired, so I reissued them; they’re valid for the next 5 years. However, the clients still complain after starting Outlook that the certificates expired, and installing new ones doesn’t get results. I tried to enable the Client-Certificate Service in group policies and refresh them, but that didn’t work.
I have almost no experience with this, so I’ve probably missed something obvious.