Event Log Errors: SpnegoTokenAuthenticator

Has anyone else seen these? We’re getting this error on our App server though we’re not even sure if it’s Epicor related. We’re trying to get rid of any gremlins that are possibly causing issues for our users and hoping if we resolve this one it’ll stop some of those unable-to-explain or replicate issues at least.

Security negotiation failed.
Service: https://*server*/*database*/Ice/Lib/SessionMod.svc
Action: http://schemas.xmlsoap.org/ws/2005/02/trust/RSTR/Issue
ActivityId: <null>
Negotiation: SpnegoTokenAuthenticator
Win32Exception: The Security Support Provider Interface (SSPI) negotiation failed.