Symptoms

Issue:
Error in the Event Viewer = 64007 Provider did not return a result for K2:NT AUTHORITYANONYMOUS LOGON on GetUser
 

Diagnoses

Diagnosis:
Also mentioned that the client can also plan to upgrade to one of the latest versions of K2 to try and avoid some issues they are running into

However this also means that there's no permanent solution that can be provided for this case because of how the service was initially designed. There's no other choice currently than to apply the various workarounds mentioned previously to keep the users enabled.

The client also mentioned the community post below:
http://community.k2.com/t5/K2-blackpearl/Authentication-Issues-K2-NT-AUTHORITY-ANONYMOUS-LOGON/td-p/47299
 

Resolution


Resolution:
They are currently working on redesigning and rebuilding the Identity Service in light of the various issues that are caused by the current architecture of the Identity Service. Based on what we have seen so far on the new design, it will help to eliminate the issue of random users getting disabled intermittently. The release timeline this new Identity Service hasn't been finalized, but it's tentatively targeted for H1 2017.