krb5.ini in c:\windows for Kerberos auth

[libdefaults]
default_realm = CORP.XYZ.COM
dns_lookup_kdc = true
dns_lookup_realm = false
ticket_lifetime = 86400
renew_lifetime = 604800
forwardable = true
default_tgs_enctypes = rc4-hmac
default_tkt_enctypes = rc4-hmac
permitted_enctypes = rc4-hmac
udp_preference_limit = 1
[realms]
CORP.XYZ.COM = {

kdc = iad1dc1.corp.xyz.com
kdc = iad1dc2.corp.xyz.com
kdc = atl1dc1.corp.xyz.com
kdc = atl1dc2.corp.xyz.com
admin_server = iad1dc1.corp.xyz.com

}