Skip to main content

Get the name of a Server using the SID

In class we received audit logs that contained only a SID.  Since we were interested in getting the name of the client associated with that SID, we turned to PowerShell for the answer.

The SID actually contains two parts.  A unique code for the domain and then the Relative Identifier (RID) for the the client. This RID is the last portion of the SID and is unique in the network.  Below is an example.

S-1-5-21-3400766600-4132462866-2336755051-1149

The RID is the numbers 1149.  This is what we need to search for in Active Directory.  For a client, use this PowerShell command.

Get-ADComputer –Filter * –Properties | Where-Object {$_.SID –like “*1149”} | Select-Object –Property Name, SID

image

The Get-ADComputer cmdlet will retrieve all computer objects in Active Directory. The –Properties parameter will add the SID to the default set of attributes that are returned from the Get-ADComputer cmdlet.

The Where-Object cmdlet will filter all the computer objects for one with a SID that ends in 1149.

The Select-Object cmdlet will remove all attributes from the output except the name and the SID.

Comments

Popular posts from this blog

Adding a Comment to a GPO with PowerShell

As I'm writing this article, I'm also writing a customization for a PowerShell course I'm teaching next week in Phoenix.  This customization deals with Group Policy and PowerShell.  For those of you who attend my classes may already know this, but I sit their and try to ask the questions to myself that others may ask as I present the material.  I finished up my customization a few hours ago and then I realized that I did not add in how to put a comment on a GPO.  This is a feature that many Group Policy Administrators may not be aware of. This past summer I attended a presentation at TechEd on Group Policy.  One organization in the crowd had over 5,000 Group Policies.  In an environment like that, the comment section can be priceless.  I always like to write in the comment section why I created the policy so I know its purpose next week after I've completed 50 other tasks and can't remember what I did 5 minutes ago. In the Group Policy module for PowerShell V3, th

Return duplicate values from a collection with PowerShell

If you have a collection of objects and you want to remove any duplicate items, it is fairly simple. # Create a collection with duplicate values $Set1 = 1 , 1 , 2 , 2 , 3 , 4 , 5 , 6 , 7 , 1 , 2   # Remove the duplicate values. $Set1 | Select-Object -Unique 1 2 3 4 5 6 7 What if you want only the duplicate values and nothing else? # Create a collection with duplicate values $Set1 = 1 , 1 , 2 , 2 , 3 , 4 , 5 , 6 , 7 , 1 , 2   #Create a second collection with duplicate values removed. $Set2 = $Set1 | Select-Object -Unique   # Return only the duplicate values. ( Compare-Object -ReferenceObject $Set2 -DifferenceObject $Set1 ) . InputObject | Select-Object – Unique 1 2 This works with objects as well as numbers.  The first command creates a collection with 2 duplicates of both 1 and 2.   The second command creates another collection with the duplicates filtered out.  The Compare-Object cmdlet will first find items that are diffe

How to list all the AD LDS instances on a server

AD LDS allows you to provide directory services to applications that are free of the confines of Active Directory.  To list all the AD LDS instances on a server, follow this procedure: Log into the server in question Open a command prompt. Type dsdbutil and press Enter Type List Instances and press Enter . You will receive a list of the instance name, both the LDAP and SSL port numbers, the location of the database, and its status.