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How to find old computers in Active Directory using Powershell

I need to find computers that haven't been used in a while in AD on a Windows 2008 R2 DC. Let's say 30 days. How would I go about listing all of those computers in alphabetical order?
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Greg27
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Greg27
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2 Solutions
 
KenMcFCommented:
You can use the 2008R2 AD cmdlets and do something like this

$d = [DateTime]::Today.AddDays(-30)
Get-ADComputer -Filter 'PasswordLastSet -ge $d' -Properties PasswordLastSet | FT Name,PasswordLastSet
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Greg27Author Commented:
This is showing me all computers and the last password date set on it. I really need a list of all computers that haven't been logged into for at least 30 days. I have a feeling I have some computers listed in AD that no longer exist on my network. Thanks.
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KenMcFCommented:
If these computers are active on the network it will be difficult to get the last time a user logged onto it. You will need to query the audit logs. If these computers are not on the network there are a few attributes you can look at. passwordlastset, Lastlogon, and lastLogonTimeStamp. There are other utilies as well, one I like is oldcmp.exe from joeware.net and the Quest AD cmdlets

get-qadcomputer -Notloggedonfor 30
get-qadcomputer -inactivefor 30


This is what the switches look for

    - The number of days that the account remains in the expired state
    - The number of days that the password of the account remains unchanged
    - The number of days that the account remains unused for logon
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sweepsCommented:
The best way is to use a program (its free and works great).....

http://cjwdev.wordpress.com/category/ad-tidy/ 

you can set it down to which ou, user or computer, you can export a list, you can have it ping what it thinks is old comp to make sure they are not online.   you can disable or delete in the the program..

awesome program,  have used it for 3 months now.
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Greg27Author Commented:
Thanks for the help! I ended up giving the most points to sweeps because that is the tool I used and I don't have the Quest AD cmdlets since I am running Powershell 2 with the AD cmdlets built-in.
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