Get OU from List of Computers

I have a file that contains several hundred computer names that I want to be able to get the distinguished name. I think I'm close but just not close enough.
Here's what I am using:
Get-Content .\servers.txt | Foreach-Object{
 Get-ADComputer $_
} | Select-Object name,@{
 name="dn";expression={
 $_.distinguishedname.substring($_.name.length+4)
 }
} | Export-CSV -path server.csv -NoTypeInformation

I can get a lot of the DN's from this script, but there are a lot that come back with ObjectNotFound. If I run Get-ADComputer manually on the one that had the error, it shows fine.
here's the error I get on some computers:

Get-ADComputer : Cannot find an object with identity: 'servername ' under: 'DC=domain,DC=local'.
At C:\tools\scripts\get-OU3.ps1:2 char:2
+  Get-ADComputer $_
+  ~~~~~~~~~~~~~~~~~
    + CategoryInfo          : ObjectNotFound: (servername :ADComputer) [Get-ADComputer], ADIdentityNotFoundExcepti
   on
    + FullyQualifiedErrorId : ActiveDirectoryCmdlet:Microsoft.ActiveDirectory.Management.ADIdentityNotFoundException,M
   icrosoft.ActiveDirectory.Management.Commands.GetADComputer

Any thoughts on why this is not working completely? or maybe my script isn't complete? Any help is much appreciated.
Chris WegerAsked:
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Subash SundharanIT Infrastructure Architect Commented:
Your computer names in input file may contain trailing space..
Try..
Get-Content .\servers.txt | Foreach-Object{
  Get-ADComputer $_.Trim()
  } | Select-Object name,@{
  name="dn";expression={
  $_.distinguishedname.substring($_.name.length+4)
  }
 } | Export-CSV -path server.csv -NoTypeInformation

Open in new window


You can also use the CanonicalName property to get the OU information..
For example..
Get-Content .\servers.txt | Foreach-Object{
  Get-ADComputer $_.Trim() -pr CanonicalName
  } | Select-Object name,@{
  name="OU";expression={
  $_.CanonicalName -Replace "/$($_.Name)"
  }
 } | Export-CSV -path server.csv -NoTypeInformation

Open in new window

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Qlemo"Batchelor", Developer and EE Topic AdvisorCommented:
There is a trailing space in 'servername '.
Chris WegerAuthor Commented:
Yep, you all were right. trailing spaces in the file.

thanks for the canonical name solution too! I like that one better than mine!
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