Symptoms

We are getting the error "No realm entries for rMYDESIGNERSITE] was found." when navigating to the K2 Designer or Runtime site.


 

Diagnoses

The error is related to STS and the web.config configuration for the sites.
 

Resolution

Adding the following missing section to the web.config for Windows sts and removing:

Negotiate provider from STS site in IIS fixed the issue.
<providers>
<remove value="NTLM" />
<add value="NTLM" />
<add value="Negotiate" />

</providers>