Also to provide more info...
You may need to configure the KRB5.ini file to use encrypted connections to the Active directory servers..
[libdefaults]
default_realm = DOMAIN.COM
default_tkt_enctypes = RC4-HMAC, DES-CBC-CRC, DES3-CBC-SHA1,DES-CBC-MD5
default_tgs_enctypes = RC4-HMAC, DES-CBC-CRC, DES3-CBC-SHA1, DES-CBC-MD5
[realms]
DDPV.COM = {
kdc = DC01.DOMAIN.COM
kdc = DC02.DOMAIN.COM
}