Set TTL in the DC Locator DNS Records

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

This policy setting specifies the value for the Time-To-Live (TTL) field in SRV resource records that are registered by the Net Logon service. These DNS records are dynamically registered, and they are used to locate the domain controller (DC). To specify the TTL for DC Locator DNS records, click Enabled, and then enter a value in seconds (for example, the value "900" is 15 minutes). If you do not configure this policy setting, it is not applied to any DCs, and DCs use their local configuration.

• 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
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  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
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  Force Rediscovery Interval

  At least Windows Vista
• Computer
  Return domain controller address type

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

  At least Windows Server 2003 operating systems or Windows XP Professional
• Computer
  Set Weight in the DC Locator DNS SRV records

  At least Windows Server 2003 operating systems or Windows XP Professional