get all ADcontroller of another domain - powershell

Question

I'm stuck in a stupid problem that I can't figure out how to solve.
I need to get all domain controllers of a trusted domain.
With this piece of code I get all DC in the current domain Get-ADDomainController -Filter *
With this I get one DC from target domain Get-ADDomainController -domain MyTrustedDomain -Discover
But how can I get all DC in target domain?

Answer 1

Can't test this due to lack of AD, but you could try the -Server option with the FQDN of the trusted domain:
Get-ADDomainController -Filter * -Server trusted.example.com

Answer 2

One way without using AD module:
$a = new-object 'System.DirectoryServices.ActiveDirectory.DirectoryContext'("domain", "other.domain.local" )
[System.DirectoryServices.ActiveDirectory.DomainController]::FindAll($a)
You need to be an 'authenticated user' in the remote domain or add username and password parameter to the DirectoryContext object

Answer 3

This command will list all domain controllers in the forest for each domain
(get-adforest).domains |%{get-addomaincontrollers -filter * -server $_}

Answer 4

I've come across the same problem as I work regularly with multiple domains. I was hoping for a more elegant solution, but so far the best I've come up with is to take your work one step further.
if Get-ADDomainController -domain MyTrustedDomain -Discover gives you one server in the target domain, you can feed that to the -server parameter to query that one DC. You do need to provide credentials to query a DC from a different domain than your login session if a trust DOES NOT exist (in a trust, the trusting domain considers you to be 'authenticated').
$targetdcname = (Get-ADDomainController -DomainName <MyTrustedDomain> -Discover).hostname
Get-ADDomainController -Filter * `
-Server $targetdcname `
-Credential (Get-Credential MyTrustedDomain\username) | ft HostName
or
Get-ADDomainController -Filter * `
-Server $((Get-ADDomainController -DomainName <MyTrustedDomain> -Discover).hostname) `
-Credential (Get-Credential MyTrustedDomain\username) | ft HostName
If you do this sort of thing alot, you can always store your credentials in a variable for reuse, $cred = Get-Credential MyTrustedDomain\username) and save the repeated prompts. The password is stored as a System.Security.SecureString and will be secure as long as you keep it within your session.
Until the Get-ADDomainController cmdlet is updated to allow both the -filter parameter AND the Domainname parameter, we're stuck with a workaround.

Answer 5

from: help get-addomaincontroller -examples
This should list all DCs in your domain
-------------------------- EXAMPLE 12 --------------------------
C:\PS>Get-ADDomainController -Filter { isGlobalCatalog -eq $true -and Site -eq "Default-First-Site-Name" }
Get all global catalogs in a given site.

Answer 6

Get-ADDomain -Identity <DOMAIN NAME> | select -ExpandProperty ReplicaDirectoryServers

Answer 7

Here is what I used
cls
$domains = (Get-ADForest).Domains;
foreach ($domain in $domains)
{
Write-Host $domain
(Get-ADDomain -Identity $domain | select -ExpandProperty ReplicaDirectoryServers).Count;
Write-Host "";
$totalCount = $totalCount + (Get-ADDomain -Identity $domain | select -ExpandProperty ReplicaDirectoryServers).Count;
}
Write-Host "Total domain controller count is: "$totalCount

Answer 8

Thanks for the start, here's what I came up with. Then I feed it to a SharePoint list.
get-adtrust -Filter * | Select-object Name, Domain,ipv4Address, OperatingSystem, Site, HostName, OperatingSystemVersion | ForEach-Object{Get-ADDomainController -Filter * -Server $_.Name}

Answer 9

Sometimes Powershell adds complexity, just open a cmd prompt and enter
C:\Windows\System32\nltest.exe /dclist:[trusted domain]
Of course, replace [trusted domain] with the name of the domain whose DC's you want.