Use DNS name resolution with a single-label domain name instead of NetBIOS name resolution to locate the DC

Supported OS tags: Windows10, Windows10RT, Windows11, Windows7, Windows8, Windows81, WindowsRT, WindowsRT81, WindowsServer2003, WindowsServer2008, WindowsServer2012, WindowsServer2012R2, WindowsServer2016, WindowsVista, WindowsXP

This policy setting specifies whether the computers to which this setting is applied attempt DNS name resolution of a single-label domain names. By default, the behavior specified in the AllowDnsSuffixSearch is used. If the AllowDnsSuffixSearch policy is disabled, then NetBIOS name resolution is used exclusively, to locate a domain controller hosting an Active Directory domain specified with a single-label name. If you enable this policy setting, computers to which this policy is applied will attempt to locate a domain controller hosting an Active Directory domain specified with a single-label name using DNS name resolution. If you disable this policy setting, computers to which this setting is applied will use the AllowDnsSuffixSearch policy, if it is not disabled or perform NetBIOS name resolution otherwise, to attempt to locate a domain controller that hosts an Active Directory domain specified with a single-label name. the computers will not the DNS name resolution in this case, unless the computer is searching for a domain with a single label DNS name that exists in the Active Directory forest to which this computer is joined. If you do not configure this policy setting, it is not applied to any computers, and computers use their local configuration.

This policy has no additional user input fields.

• Computer
  Block NetBIOS-based discovery for domain controller location

  Windows10
• Computer
  Do not process incoming mailslot messages used for domain controller location based on NetBIOS domain names

  At least Windows Vista
• Computer
  Do not use NetBIOS-based discovery for domain controller location when DNS-based discovery fails

  At least Windows Server 2012, Windows 8 or Windows RT
• Computer
  Force Rediscovery Interval

  At least Windows Vista
• Computer
  Return domain controller address type

  At least Windows Vista
• Computer
  Set Priority in the DC Locator DNS SRV records

  At least Windows Server 2003 operating systems or Windows XP Professional
• Computer
  Set TTL in the DC Locator DNS Records

  At least Windows Server 2003 operating systems or Windows XP Professional