Service Records of Domain Controller used by Various Services and Components

by [Published on 3 Dec. 2008 / Last Updated on 22 Sept. 2008]

This article explains what all components or Services use the SRV records of domain controller.

SRV records play an important role in an Active Directory Domain. A DC can not function without it's Service Records. The following services or Windows Components use the SRV records:

  • AD Replication
  • When replicating information to other domain controllers. DSA always queries the domain controllers using SRV Query. 
  • Group Policy
  • Winlogon Service pulls the list of GPOs from the domain controller. To find the domain controller it looks for SRV records in the domain zone.
  • Client Authentication
  • Client finds the domain controller with the help of DNS Server by querying DC's SRV record in the DNS Domain Zone.
  • AD Management Tools
  • Active Directory Users and Computers, Active Directory Domains and Trusts, Active Directory Sites and Services and other AD Tools always query the DNS server to find the domain controller.  
  • Group Policy Editor (Gpedit.msc)
  • By default, Gpedit.msc uses the PDC to edit the Group Policy. It queries the DNS Server to find the IP Address of the PDC.  
  • Third-party applications
  • Any third-party application query DNS to find the domain controller.


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The Author — Nirmal Sharma

Nirmal Sharma avatar

Nirmal Sharma is a MCSEx3, MCITP, and was awarded Microsoft MVP in Directory Services. In his spare time, he likes to help others and share some of his knowledge by writing tips and articles for various online communities. Nirmal can also be found contributing to PowerShell based Dynamic Packs for ADHealthProf.ITDynamicPacks.Net solutions.

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