[ovirt-users] oVirt 4.0.4 and Active Directory Kerberos SSO for Administration/User Portal. Troubleshooting

Hello oVirt guru`s! I set up oVirt integration with Active Directory LDAP according to the manual: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Virtuali... I created a profile integration with my domain. All is working well. Now I'm trying to configure single sign-on for portals based on Kerberos. All settings are performed according to the manual: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Virtuali... Kerberos client tested and working. However, SSO is not working. Please tell me how to find the cause of the problem. What are the steps to troubleshooting to do?