we are using Virtual PCs for some testing mockup. One VPC is running as Domain Controller with AD configured on it. The domain name is testing.local. We have another VPC in domain running web application (configured as web site listening at port 198) using Integrated Windows Authentication and basic authentication (to send login id/pwd). Now the problem is that some users created in AD can access this application (http://testsystem:198/) and some cannot. IIS gives 401.2 error even after entering right login id/pwd combination.
I tried to search web and was directed to AuthDiag tool. I installed it and ran Active Directory (Kerberos Key Distribution Center) Information. It shows following error many times (there are many web sites running in this VPC):
Service principal name (SPN) for machine 'testsystem' not found in Active Directory
Please help we are stuck and cannot test application.