Thanks Sumit for the quick reply.
Yes it is using sssd 1.13.4.
apt list --installed|grep sssd
WARNING: apt does not have a stable CLI interface. Use with caution in scripts.
sssd/xenial-updates,now 1.13.4-1ubuntu1.15 amd64 [installed,automatic]
sssd-ad/xenial-updates,now 1.13.4-1ubuntu1.15 amd64 [installed,automatic]
sssd-ad-common/xenial-updates,now 1.13.4-1ubuntu1.15 amd64 [installed,automatic]
sssd-common/xenial-updates,now 1.13.4-1ubuntu1.15 amd64 [installed,automatic]
sssd-ipa/xenial-updates,now 1.13.4-1ubuntu1.15 amd64 [installed,automatic]
sssd-krb5/xenial-updates,now 1.13.4-1ubuntu1.15 amd64 [installed,automatic]
sssd-krb5-common/xenial-updates,now 1.13.4-1ubuntu1.15 amd64 [installed,automatic]
sssd-ldap/xenial-updates,now 1.13.4-1ubuntu1.15 amd64 [installed,automatic]
sssd-proxy/xenial-updates,now 1.13.4-1ubuntu1.15 amd64 [installed,automatic]
sssd-tools/xenial-updates,now 1.13.4-1ubuntu1.15 amd64 [installed]
What additional configuration can we add to support name resolution order?
TIA