dcdiag checks DNS, connectivity, replication, security descriptors and logon permissions, role advertisment, knowledge of FSMO role holders, intersite replication, machine account registration, services, FRS volumes, logs, events and more.

Usage Guide

dcdiag runs a set of tests on domain controllers. These tests include:

  • TCP connectivity
  • Site connectivity
  • LDAP connectivity
  • RPC connectivity
  • WMI connectivity
  • DNS checks: delegation, forwarders, record registration, update and external name resolution
  • Replication
  • FSMO roles
  • Domain controller functionality
  • Trusts
  • Site health

Tool Data

Operating Platform:Windows
Diagnostic Target:Directory Services - Sites and Topology
Tool Executable:dcdiag.exe
Obtain From:Installed with Windows 2008 domain services or LDS roles, or can be installed from the remote server administration tools. In Windows 2003 is is included with the support tools.
Web Links:

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