Hi, I started out trying to figure out why CPU-load was 100% making my SP server unusable. Then I must have done something to make the Security Token Service not work.
There is always a list of things in SharePoint that needs to match. User account on the SQL server, to some application pool account etc. For this service - what are they? So that I can check where the mistake is.
BTW -we have a farm solution where the SQL server is on a separate server.