Dear Patrick,
I have the configuration as you have mentioned, and yes I did the same document you have mentioned. would it be any thing related to Windows service accounts, that were created?
Below is a snapshot of my conf file
[libdefaults]
; dns_lookup_kdc = false
; ticket_lifetime = 24000
default_realm = xxxx.xxxx
default_keytab_name = /opt/smuser/wakrb0104.keytab
default_tkt_enctypes = AES256-SHA1
default_tgs_enctypes = AES256-SHA1
[domain_realm]
xxxx.xxxx = xxxx.xxxx
[realms]
xxxx.xxxx = {
; DCs specified here will be always tried by Kerberos first and at least
; one of them must be functional. The list can be pruned if desired.
; kdc = ***.***.***.**:88
; kdc = ***.***.***.**:88
; kdc = ***.***.***.**:88
; kdc = ***.***.***.**:88
kdc = osl-dc-1.xxxx.xxxx:88
default_domain = xxxx.xxxx