try to recreate keytab with my encryption type, after that put it in the openfire directory. Then change krb5.ini and reboot the server.
1.3 in CMD run this command and save file openfire.keytab in drive C.
ktpass /princ xmpp/srv-chat.domain.local@DOMAIN.LOCAL /mapuser openfire@domain.local /pass * /ptype KRB5_NT_PRIN
and
2.4 Create a Kerberos configuration file and save it as krb5.ini to /etc/krb5.conf
[libdefaults]
default_realm = DOMAIN.LOCAL
default_keytab_name = /usr/share/openfire/resources/openfire.keytab
default_tkt_enctypes = rc4-hmac des3-cbc-sha1 des-cbc-crc des-cbc-md5
default_tgs_enctypes = rc4-hmac des3-cbc-sha1 des-cbc-crc des-cbc-md5
permitted_enctypes = rc4-hmac des3-cbc-sha1 des-cbc-crc des-cbc-md5
[realms]
DOMAIN.LOCAL = {
kdc = srvdc3.domain.local
admin_server = srvdc3.domain.local
default_domain = domain.local
}
[domain_realms]
domain.com = DOMAIN.LOCAL
.domain.com = DOMAIN.LOCAL