Am I a GC?


Am I a GC ? or DC ?

The answer is fun to find out whether a Domain Controller is Global Catalog server which has several ways to find out

I. ADUC:

Open Active Directory Users and Computers –>Right click on Domain –> select Change Domain Controller

DSA-change DC dsa-change dc2

II. ADSIEdit Output:

There are three important attribute types which are important in AD

  • System Only
  • Constructed and
  • Backlinks

Constructed attributes are most important attributes in AD which provides advance interpretation of AD operations. One such attribute is msds-isgc, this attribute identifies the state of Global Catalog Server.

ISGC-ADSIedit

III. DSQuery

Global catalog status can be viewed using DSQuery tool as shown below

ISGC-DSQuery

IV NLTest:

Global Catalog status can be found using NLTest tool through Flags Status as shown below

ISGC-NLTest1

ISGC-NLTest2

V. LDP:

One other tool to view Global catalog status is by using LDP tool. Please note that Constructed Attribute cannot be viewed using standard LDP interface instead, a search should be made to view the status of a Global Catalog Server as shown below.

ldp -isgc

Other tools include PowerShell or DS API requires DN path to search for the value.

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