Powershell script assistance

Hello,

We have extended our schema to include additional attributes, but this schema has not been updated in all the forests. Is there a powershell script that I can use to check if an attribute is present in schema. I have been asked to report the values of attribute1 for all user objects in all the forests. In some forests this attribute1 is not even there.

For instance:  I want to check if  attribute1 is present in schema.

Thanks
Parity123Asked:
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Jeremy WeisingerSenior Network Consultant / EngineerCommented:
Check out this link to see if that helps.
http://blogs.technet.com/b/heyscriptingguy/archive/2013/07/24/exploring-active-directory-data-types-with-powershell.aspx

Let us know if you have more questions.
Parity123Author Commented:
I looked at the link.  I wanted something like passing an attribute as parameter to the script and returns True if it exists.
Jason CrawfordTransport NinjaCommented:
Are the other forests in separate AD sites?  If so you can just force intersite replication either by ADSS:

https://technet.microsoft.com/en-us/library/cc816926(v=ws.10).aspx

Or by repadmin:

repadmin /syncall <DC you're pushing changes from> /APedq

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Instead of looking for a specific attribute, do you know if the schema version changed?  If so you could just run this to find the version:

Get-ADObject (Get-ADRootDSE).schemaNamingContext -Property objectVersion

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Parity123Author Commented:
Schema version has not changed. We have custom attributes missing in some forests. If there is a way to pass the attribute to check, would be nice
Jason CrawfordTransport NinjaCommented:
It would be really helpful if you could tell me which specific attribute you're looking for, or at a minimum a specific class.
Parity123Author Commented:
It is a custom attribute, let us call it myattribute1. I want to check for myattribute1 in all the forests with a script.
Jason CrawfordTransport NinjaCommented:
That leaves a lot of questions, but something like this might work:

Param (
    [Parameter()][String]$Attribute
)

$schema = ([DirectoryServices.ActiveDirectory.ActiveDirectorySchema]::GetCurrentSchema()).FindClass('user').optionalproperties

if ($schema.name -contains $Attribute) {
    Write-Host $Attribute 'exists' -ForegroundColor Green
}
else {
    Write-Host $Attribute 'does not exist' -ForegroundColor Red
}

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Here's what it looks like when run on a 2012 R2 DC:

example.PNG
Note the $schema variable has been limited to the 'user' class so unless your custom attribute also happens to be in the same class it won't work as-is.  All you'd have to do is replace user with the correct class and it would run fine.

I borrowed very heavily from The Scripting Guy:

http://blogs.technet.com/b/heyscriptingguy/archive/2013/07/24/exploring-active-directory-data-types-with-powershell.aspx
example.PNG

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