Within the last 24 hours we have had all of our servers start throwing authentication errors when any users try to connect to our Service Desk WebAccess environments. It started on one of our web servers yesterday and had effected all the rest of our web servers (including Test) today. To provide as much detail is possible, I will explain our findings thus far.
Dozens of these will continuously pop-up and when you get through you get to a WebAccess view that looks like this:
On the server side, while troubleshooting I noticed that the app pool configurations are no longer connecting properly and I am getting the error below:
I have spent hours troubleshooting this issue with very little success and I was wondering if anyone out there may have experienced something like this before and where you turned to find a solution. Any and all guidance is appreciated. No configuration changes were made to any of the servers that should have caused something like this so it may be a problem not even rooted in Service Desk at all, but thank you to anyone who may have a helpful suggestion.