During Site Recovery Manager 8.4 or 8.5 OVF deployment, you have the option of configuring the Domain Search Path parameter, used to look up hosts among the specified domains
However, following deployment, the appliance is unable to resolve hosts by short name and /etc/resolv.conf does not show any search options for the previously-specified domains. DNS Search options also remain absent from the configuration interface.
This is a product issue and is not due to a deployment misconfiguration. The property was not being ingested by the configuration tool on the appliance, and the configuration interface does not provide fields or configuration options for DNS Search paths.
This issue is slated to be resolved in Site Recovery Manager 8.6, upon its release. OVF configuration properties will be properly ingested, and web configurators will reveal fields or options to add or update DNS Search paths.
Update systemd-resolver with the desired Domains option:
The appliance may be unable to resolve hosts by hostname or short name. The appliance should still continue to resolve hosts by FQDN, if DNS is configured and functioning correctly.
Manually editing /etc/resolv.conf to include domain search entries corrects this, but this does not persist appliance reboots.