Hello,
One one of our FreeIPA servers we are seeing the following messages from journal -f

Dec 01 11:50:14 ipa-01.int.domain.com krb5kdc[7056](info): AS_REQ (8 etypes {18 17 16 23 25 26 20 19}) 10.3.5.88: PREAUTH_FAILED: host/ipa-01.int.domain.com@INT.domain.COM for krbtgt/INT.domain.COM@INT.domain.COM, Preauthentication failed
Dec 01 11:50:14 ipa-01.int.domain.com krb5kdc[7056](info): closing down fd 11
Dec 01 11:50:14 ipa-01.int.domain.com [sssd[ldap_child[9717]]][9717]: Failed to initialize credentials using keytab [MEMORY:/etc/krb5.keytab]: Preauthentication failed. Unable to create GSSAPI-encrypted LDAP connection.
Dec 01 11:50:14 ipa-01.int.domain.com [sssd[ldap_child[9717]]][9717]: Preauthentication failed
Dec 01 11:50:14 ipa-01.int.domain.com krb5kdc[7056](info): AS_REQ (8 etypes {18 17 16 23 25 26 20 19}) 10.3.5.88: NEEDED_PREAUTH: host/ipa-01.int.domain.com@INT.domain.COM for krbtgt/INT.domain.COM@INT.domain.COM, Additional pre-authentication required
Dec 01 11:50:14 ipa-01.int.domain.com krb5kdc[7056](info): closing down fd 11
Dec 01 11:50:14 ipa-01.int.domain.com krb5kdc[7055](info): preauth (encrypted_timestamp) verify failure: Preauthentication failed
Dec 01 11:50:14 ipa-01.int.domain.com krb5kdc[7055](info): AS_REQ (8 etypes {18 17 16 23 25 26 20 19}) 10.3.5.88: PREAUTH_FAILED: host/ipa-01.int.domain.com@INT.domain.COM for krbtgt/INT.domain.COM@INT.domain.COM, Preauthentication failed
Dec 01 11:50:14 ipa-01.int.domain.com krb5kdc[7055](info): closing down fd 11
Dec 01 11:50:14 ipa-01.int.domain.com [sssd[ldap_child[9721]]][9721]: Failed to initialize credentials using keytab [MEMORY:/etc/krb5.keytab]: Preauthentication failed. Unable to create GSSAPI-encrypted LDAP connection.
Dec 01 11:50:14 ipa-01.int.domain.com [sssd[ldap_child[9721]]][9721]: Preauthentication failed

[root@pul-lv-ipa-01 ~]# ipa --version
VERSION: 4.5.0, API_VERSION: 2.228

I[root@pul-lv-ipa-01 log]# cat /etc/centos-release
CentOS Linux release 7.4.1708 (Core)

Many thanks for any help,

Regards,
James Harrison