I run a small network at a private school. My predecessors had a host of Virtual Microsoft servers operating things (versions 2003 to 2012). Though I can keep up with most MS enterprise environments I'm no expert and everything I do know has been gleaned from forums and past coworkers (aka no real schooling in the area). My efforts have been in moving our resources to the cloud and Azure services and I've missed a couple maintenance benchmarks along the way.
My current dilemma has to do with the security certificates in the domain. I accidentally allowed the certificate to expire (as of Jan 21, 2021). I believe I've successfully renewed it, though I can't really say for certain as I don't know what to look for. The initial indicator was when my wifi users stopped being able to log into the network with their devices using their domain credentials sending me down the rabbit hole of Radius and NPS research and learning.
Following some updates to my Wireless APs firmware and Managed network switches I have regained some connection for most users but not for everyone. Furthermore, I can't seem to find the reason for any of it.
As of 2 days ago I have some wired workstations where only admin users can log in and anyone else trying to log in receives the following message: "the sign-in method you're trying to use isn't allowed". I also have found some users are losing the ability to print to network printers.
I believe this is all tied to the original security certificate issue and I've done something incorrectly. I'm pretty desperate here - any help would be appreciated.
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