The DNSDomainSuffixSearchOrder property specifies the DNS domain suffixes to be appended to the end of host names during ...

The DNSDomainSuffixSearchOrder property specifies the DNS domain suffixes to be appended to the end of host names during name resolution. When attempting to resolve a fully qualified domain name (FQDN) from a host only name, the system will first append the local domain name. If this is not successful, the system will use the domain suffix list to create additional FQDNs in the order listed and query DNS servers for each.
Example: samples.microsoft.com example.microsoft.com