samba - Nov 2019 - Cloning from a backup: unable to reach any KDC in realm

Greetings,

This post pertains to a Disaster Recovery (DR) scenario on a Samba 4.8 
server. The DR server was provisioned as a standalone host, on a 
network isolated from the Production Server (PS).
    The DR's /var/db/samba4 directory, which contains the private
directory, was then renamed and replaced with the PS' /var/db/samba4
backup. kinit now fails on the DR  with:

kinit: krb5_get_init_creds: unable to reach any KDC in realm PRODUCTION

Will   samba_dnsupdate --verbose   resolve this situation?
Is there a way for the DR host to seize the KDC?
What is the correct procedure to provision and clone a DR host from a
backup?

Thank you,

-- 
Don Kuenz KB7RPU
There was a young lady named Bright Whose speed was far faster than light;
She set out one day In a relative way And returned on the previous night.