ArcGIS Server: "Cannot authenticate supplied identity" Error

Wed, May 6, 2009 One-minute read

So, I get this error from time to time in a dev environment or, occasionally, on a client’s server. It used to be very, very frustrating to solve, so I created a checklist of things that worked. I am writing it here to help others, hopefully, and make sure I never forget these steps.  I always try them in the following order.