Policy
Connection-specific DNS suffix
Specifies a connection-specific DNS suffix. This policy setting supersedes local connection-specific DNS suffixes, and those configured using DHCP. To use this policy setting, click Enabled, and then enter a string value representing the DNS suffix. If you enable this policy setting, the DNS suffix that you enter will be applied to all network connections used by the DNS client. If you disable this policy setting, or if you do not configure this policy setting, the DNS client will use the local or DHCP supplied connection specific DNS suffix, if configured.
ac1ba4546b16 DNS_Domain Registry
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HKLM\Software\Policies\Microsoft\Windows NT\DNSClient\AdapterDomainName Policy notes
Specifies a connection-specific DNS suffix. This policy setting supersedes local connection-specific DNS suffixes, and those configured using DHCP. To use this policy setting, click Enabled, and then enter a string value representing the DNS suffix. If you enable this policy setting, the DNS suffix that you enter will be applied to all network connections used by the DNS client. If you disable this policy setting, or if you do not configure this policy setting, the DNS client will use the local or DHCP supplied connection specific DNS suffix, if configured.