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Identifying what domain controllers are not global catalogs

Posted on 2013-12-19
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Last Modified: 2014-01-04
Hi everyone,

Id like to ask you kind People if there is a scripted way to query AD to determine what domain controllers are NOT global catalogs?

Is there also a way to then via script, make those domain controllers found, global catalogs?

Thank you everyone and have a great christmas and newyear.
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Question by:Simon336697
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Mike Kline earned 250 total points
ID: 39730890
You can use the following to find DCs that are not GCs

Get-ADDomainController -Filter {IsGlobalCatalog -eq $false}

for the second I used something from MVP Richard Siddaway's blog, notice I changed the first line.

PLEASE TEST THIS FIRST!!!  I will personally test part 2 in the morning.

http://msmvps.com/blogs/richardsiddaway/archive/2012/03/18/enable-global-catalog.aspx

$dc = Get-ADDomainController -Filter {IsGlobalCatalog -eq $false}         
$contextType = [System.DirectoryServices.ActiveDirectory.DirectoryContextType]::DirectoryServer            
$context = New-Object -TypeName System.DirectoryServices.ActiveDirectory.DirectoryContext -ArgumentList $contextType, $dc            
$gc = [System.DirectoryServices.ActiveDirectory.DomainController]::GetDomainController($context)            
$gc.EnableGlobalCatalog()

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Thanks

Mike
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Assisted Solution

by:Aanand Singh Karki
Aanand Singh Karki earned 150 total points
ID: 39731499
Hi Simon,

You can Simply Run NlTest Commands to get the DC and GC Information in your Forest..

http://technet.microsoft.com/en-us/library/cc756476(v=ws.10).aspx

http://technet.microsoft.com/en-us/library/cc731935.aspx


dsquery server -isgc

dsquery server -forest -isgc

or Simply

nltest /dsgetdc:Domain name /GC
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by:hirenvmajithiya
hirenvmajithiya earned 100 total points
ID: 39733279
To determine which DC is a global catalog server (Graphical method)


1.Open Active Directory Sites and Services.

2.In the console tree, expand upto Server and then NTDS Settings.

3.Right-click the NTDS Settings object, and then click Properties.

4.On the General tab, if the Global Catalog box is checked, the DC is GC server.

Check this for every DC.
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