Policy

Use lowercase DNS host names when registering domain controller SRV records

This policy setting configures whether the domain controllers to which this setting is applied will lowercase their DNS host name when registering SRV records. If enabled, domain controllers will lowercase their DNS host name when registering domain controller SRV records. A best-effort attempt will be made to delete any previously registered SRV records that contain mixed-case DNS host names. For more information and potential manual cleanup procedures, see the link below. If disabled, domain controllers will use their configured DNS host name as-is when registering domain controller SRV records. If not configured, domain controllers will default to using their local configuration. The default local configuration is enabled. A reboot is not required for changes to this setting to take effect. More information is available at https://aka.ms/lowercasehostnamesrvrecord

Policy
Pack Microsoft Windows
Category System / Net Logon / DC Locator DNS Records
Policy ID 022dc46b72d4
Internal name Netlogon_DnsSrvRecordUseLowerCaseHostNames

Registry

Copy registry mappings

HKLM\Software\Policies\Microsoft\Netlogon\Parameters\DnsSrvRecordUseLowerCaseHostNames (enabled) = 1
HKLM\Software\Policies\Microsoft\Netlogon\Parameters\DnsSrvRecordUseLowerCaseHostNames (disabled) = 0

Policy notes

This policy setting configures whether the domain controllers to which this setting is applied will lowercase their DNS host name when registering SRV records. If enabled, domain controllers will lowercase their DNS host name when registering domain controller SRV records. A best-effort attempt will be made to delete any previously registered SRV records that contain mixed-case DNS host names. For more information and potential manual cleanup procedures, see the link below. If disabled, domain controllers will use their configured DNS host name as-is when registering domain controller SRV records. If not configured, domain controllers will default to using their local configuration. The default local configuration is enabled. A reboot is not required for changes to this setting to take effect. More information is available at https://aka.ms/lowercasehostnamesrvrecord

Related policies

Block NetBIOS-based discovery for domain controller locationDo not process incoming mailslot messages used for domain controller location based on NetBIOS domain namesDo not use NetBIOS-based discovery for domain controller location when DNS-based discovery failsForce Rediscovery IntervalReturn domain controller address typeSet Priority in the DC Locator DNS SRV recordsSet TTL in the DC Locator DNS Records