On a RHEL5.8 system authenticating to Windows 2008 using sssd, fail-over doesn't seem to work when multiple AD servers are specified

Issue

• On a RHEL5.8 system authenticating to Windows 2008using sssd, fail-over doesn't seem to work when multiple AD servers are specified
• When sssd is used for AD authentication kerberos fail-over doesn't work when multiple AD controllers are mentioned

Example: In the below example we have 3 AD servers mentioned

            krb5_server = server1.example.com, server2.example.com, server3.example.com  
            ldap_uri = ldap://server1.example.com, ldap://server2.example.com, ldap://server3.example.com

if server1, server2 are unavailable sssd fails to use the server3 AD server to authenticate the user.