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Active Directory Cookbook by Robbie Allen

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3.19. Finding the Global Catalog Servers in a Forest

Problem

You want a list of the global catalog servers in a forest.

Solution

Using a graphical user interface

  1. Open LDP and from the menu select Connection Connect.

  2. For Server, enter the name of a DC.

  3. For Port, enter 389.

  4. Click OK.

  5. From the menu select Connection Bind.

  6. Enter credentials of a domain user.

  7. Click OK.

  8. From the menu select Browse Search.

  9. For BaseDN, type the DN of the Sites container (e.g., cn=sites,cn=configuration,dc=rallencorp, dc=com).

  10. For Scope, select Subtree.

  11. For Filter, enter (&(objectcategory=ntdsdsa)(options=1)).

  12. Click Run.

Using a command-line interface

> dsquery server -forest -isgc

Using VBScript

' This code prints the global catalog servers for the specified forest.
' ------ SCRIPT CONFIGURATION ------
strForestName = "<ForestDNSName>" ' e.g. rallencorp.com ' ------ END CONFIGURATION --------- set objRootDSE = GetObject("LDAP://" & strForestName & "/" & "RootDSE") strADsPath = "<LDAP://" & objRootDSE.Get("configurationNamingContext") & ">;" strFilter = "(&(objectcategory=ntdsdsa)(options=1));" strAttrs = "distinguishedname;" strScope = "SubTree" set objConn = CreateObject("ADODB.Connection") objConn.Provider = "ADsDSOObject" objConn.Open "Active Directory Provider" set objRS = objConn.Execute(strADsPath & strFilter & strAttrs & strScope) objRS.MoveFirst while not objRS.EOF set objNTDS = GetObject("LDAP://" & objRS.Fields(0).Value) set objServer = GetObject( objNTDS.Parent ) Wscript.Echo objServer.Get("dNSHostName") ...

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