Monthly Archives: March 2015

QuickTip: Add VMware PowerCLI to PowerShell Console

Although officially the PowerCLI cmdlets are only supported by VMware when running the PowerCLI console it is possible to add the majority of the PowerCLI cmdlets by manually adding the VMware.VimAutomation.Core snapin in your current console:

Add-PSSnapin -Name VMware.VimAutomation.Core

This is particularly useful when running PowerCLI script from the task scheduler as the scripts can just be executed using PowerShell.

As suggested in the comments it is also possible to add all registered VMware PSSnapin’s by runing the following code:

Get-PSSnapin -Registered |
Where-Object {$_.Name -like 'vmware*'} | ForEach-Object {
    Add-PSSnapin -Name $_.Name

Get-ExtensionAttribute – Script in TechNet Script Gallery

Previously I blogged about listing extended file and folder attributes using the Shell.Application object in PowerShell in my List length and bitrate for mp3 files using Shell.Application article. As a result of that post I decided to write a function, Get-ExtensionAttribute, to properly and consistently be able to list extension attributes even when the locale or version of windows is different.

For this purpose I have created a dynamic parameter -ExtensionAttribute which retrieves all extension attributes available on the system it is run which can be selected and displayed. The function takes path names from either pipeline or as a single path or collection of paths.

Get-ExtensionAttribute -FullName C:\Music -ExtensionAttribute Size,Length,Bitrate

Retrieves the Size,Length,Bitrate and FullName of the contents of the C:\Music folder, non recursively

Get-ExtensionAttribute -FullName C:\Music\Song2.mp3,C:\Music\Song.mp3 -ExtensionAttribute Size,Length,Bitrate

Retrieves the Size,Length,Bitrate and FullName of Song.mp3 and Song2.mp3 in the C:\Music folder

Get-ChildItem -Recurse C:\Video | Get-ExtensionAttribute -ExtensionAttribute Size,Length,Bitrate,Totalbitrate

Uses the Get-ChildItem cmdlet to provide input to the Get-ExtensionAttribute function and retrieves selected attributes for the C:\Videos folder recursively

Get-ChildItem -Recurse C:\Music | Select-Object FullName,Length,@{Name = 'Bitrate' ; Expression = { Get-ExtensionAttribute -FullName $_.FullName -ExtensionAttribute Bitrate | Select-Object -ExpandProperty Bitrate } }

Combines the output from Get-ChildItem with the Get-ExtensionAttribute function, selecting the FullName and Length properties from Get-ChildItem with the ExtensionAttribute Bitrate

The complete function is available in the TechNet Script Library. To view this script or to participate in the discussions about this script either comment here or in the TechNet Script Library.

TechNet Script Library
My entries in TechNet Script Gallery

Active Directory Friday: Create new OU

PowerShell can be used to create any number of objects in Active Directory. Today I will demonstrate how to create an organizational unit using both the ActiveDirectory module as well as the [adsi] alternative.

Creating an OU using the New-ADOrganizationalUnit is quite straight forward:

New-ADOrganizationalUnit -Name Departments -Path "ou=Resources,DC=jaapbrasser,DC=com'

Using the [adsi] accelerator to create an OU requires some additional steps. First the parent object has to be selected, in this example the Resources OU in the domain. The next step is create a new object, an organizationalunit in this case, finally the changes are committed to Active Directory by using the SetInfo() method.

$TargetOU = [adsi]'LDAP://ou=Resources,DC=jaapbrasser,DC=com'
$NewOU = $TargetOU.Create('organizationalUnit','ou=Departments')

That is all there is to it, creating an Organizational Unit in Active Directory is quite easy, with or without the ActiveDirectory module.


Update to my TechNet scripts

I upload some of my scripts into the TechNet Script Gallery and there are some lively discussions going on in the questions and answers sections of the scripts. I received feedback and based on that I have improved and updated some of my scripts.

The first script I would like to highlight is the Get-RemoteProgram script that has been built as a replacement for the Win32_Product WMI class. The Win32_Product class is useful but there are some downsides to this, have a look at this article for more information. This prompted me to write an alternative function for this purpose. This function generates a list by querying the registry and returning the installed programs of a local or remote computer. In the latest version of this script. There was an issue with some scenarios when running this script on a 32 bit machine which have been resolved in the latest version.

Get-RemoteProgram -ComputerName Server01 -Property DisplayVersion,VersionMajor 
Will gather the list of programs from Server01 and attempts to retrieve the displayversion and versionmajor subkeys from the registry for each installed program 
'server01','server02' | Get-RemoteProgram -Property Uninstallstring 
Will retrieve the installed programs on server01/02 that are passed on to the function through the pipeline and also retrieves the uninstall string for each program

The second script that received an update is the Get-ScheduledTask the status of the tasks was listed in integers instead of ‘Running’,’Disabled’ or ‘Ready’. This has been updated and there were also scenarios in which the script would list the same task twice which has also been patched.

.\Get-ScheduledTask.ps1 -Computername mycomputer1

This command query mycomputer1 and display a formatted list of all scheduled tasks on  that computer

Another script that I have updated is the Get-OrphanHomeFolder, this script takes a folder path as input and checks if the the folder has a corresponding samaccountname in Active Directory and if that is the case if the account is enabled or disabled. A request came in to also display the enabled users in order to get a full overview. Because of this I added the DisplayAll parameter to the script.

.PARAMETER DisplayAll 
This switch parameters will force the script to also display enabled active directory  accounts, can be used in combination with -FolderSize parameter. 

.\Get-OrphanHomeFolder.ps1 -HomeFolderPath \\Server01\Home -FolderSize -DisplayAll 
Will list all the folders in the \\Server01\Home path. For each of these folders it    will query AD using the foldername, regardless of the AD results folder size will be returned 

The last script I updated is the Compare-ADuserAddGroupGUI this script compares the group membership between two users. The goal of this script is to grant the destination user all the missing memberships when compared to the source user. Any missing memberships will be added by this script and and any additional memberships will be removed. The ComputerName parameter has been added to this script in order to specify which domain controller will be queried for the comparison.

.\Compare-ADuserAddGroupGUI.ps1 testuserabc123 testuserabc456

This command will add&remove from groups testuserabc456 to match groups that testuserabc123 is a member of the user is prompted by user interface to confirm these changes.


Will use GUI to prompt for confirmation 

For a complete list of all my script feel free to browse to my submissions in the TechNet Script Gallery.

TechNet Script Gallery
My entries in TechNet Script Gallery
Get-RemoteProgram Get-ScheduledTask
Get-OrphanHomeFolder Compare-ADuserAddGroupGUI

Quicktip: Get-PSDrive does not filter provider with Where-Object

When attempting to filter the results of Get-PSDrive you might notice that filtering by using Where-Object for the Provider property does not work as expected. For example the following code will not yield the expected results and will in fact not return any drives:

Get-PSDRive | Where-Object {$_.Provider -eq 'FileSystem'}

So let’s have a look at the reason for this, if we take a look at the Provider property of the output and what it contains:

PS C:\Users\JaapBrasser (Get-PSDrive).Provider.GetType()
IsPublic IsSerial Name BaseType
-------- -------- ---- --------
True True Object[] System.Array
PS C:\Users\JaapBrasser (Get-PSDrive).Provider | Get-Member -MemberType Property
 TypeName: System.Management.Automation.ProviderInfo
Name MemberType Definition
---- ---------- ----------
Capabilities Property System.Management.Automation.Provider.ProviderCapabil...
Description Property string Description {get;set;}
Drives Property System.Collections.ObjectModel.Collection[System.Management...
HelpFile Property string HelpFile {get;}
Home Property string Home {get;set;}
ImplementingType Property type ImplementingType {get;}
Module Property psmoduleinfo Module {get;}
ModuleName Property string ModuleName {get;}
Name Property string Name {get;}
PSSnapIn Property System.Management.Automation.PSSnapInInfo PSSnapIn {get;}

So in order to correctly use Where-Object here, the comparison should be made to Provider.Name property instead, here is what the successful Where-Object filter script looks like:

Get-PSDRive | Where-Object {$_.Provider.Name -eq 'FileSystem'}

An easier and more correct form of only listing the FileSystem drives on your system would be by using the -PSProvider parameter of the Get-PSDrive cmdlet. By using this we can avoid using the pipeline and simplify the code even further:

Get-PSDRive -PSProvider FileSystem

How to learn PowerShell

I wrote this article because I frequently get the question: “How can I learn PowerShell?”. PowerShell is insanely useful for IT professionals working with Microsoft Technologies nowadays, the biggest hurdle for most people seems to be getting started with PowerShell. Once the basic skills are in place the benefits of using PowerShell for automation will be hard to avoid. I wrote this blog post to list the information and resources I have used to both learn PowerShell as well as to improve and refine what I already knew.

Having a good foundation is something that will definitely benefit you in the long run. I believe reading a book is a great method of achieving that. The Scripting Guy, Ed Wilson, has written many easy to digest books that will give you a good foundation for further developing your PowerShell skills for example Windows PowerShell Best Practices. Another good book to get start is PowerShell in a Month of Lunches by Don Jones. My personal favorite is the older  PowerShell in Action by Bruce Payette, it is occasionally a bit of a deep dive and although I would not recommend it as a first book to read on this subject it is a great resource if you would like to know more about PowerShell. Jason Hofferle compiled a list of free eBooks on his blog which is available here: List of Free PowerShell eBooks.

Reading blogs is another good method of learning and developing your PowerShell skills. I think the Scripting Guy Blog is most active PowerShell blog I am aware of and I personally also frequently visit and a number of blogs of PowerShell enthusiasts. Twitter is quite good to keep up to date with PowerShell information, have a look at the #PowerShell and you will see that there is plenty of content tweeted.

Frequenting forums and seeing how other people are using PowerShell, seeing the issues they are running into and how they fixed them is a great way to learn. If you see something you actually know the answer to you might be able to help someone out yourself. I learned a lot just by being active on forums and seeing how experts applied their knowledge of PowerShell to solve every day problems. Some active forums are: TechNet, and Reddit/r/PowerShell. Another alternative is Slack, there is a dedicated chat channel available here where you can directly talk to like-minded people. Boe Prox has a great overview for all available PowerShell forums and discussion platforms on his blog: PowerShell Forum Directory.

A good way to get some practice to using PowerShell if you are currently not in a position where you can use PowerShell at work is to have a look at the Scripting Games. The scripting games are a yearly event in which contestants competed by submitting scripts which were rated by a team of judges. The great thing is that you can pick a single scripting exercise from any of the Scripting Games and read the expert comments while you are scripting It gives you both the assignment as well as guidance which is very useful when you have just started scripting. Here are the links for the Scripting Games for the past few years:
Scripting Games 2010 / 2011 / 2012 /

Depending on the area where you live you could join (or even start!) a local or virtual PowerShell community. There are dozens of communities which frequently hold either offline or online meetings in which new concepts are discussed and members get a chance to discuss issues they are running into or cool tricks that they discovered. For an overview you can have a look at, or simply type in the name of you city/state or country in your favorite search engine to find any groups nearby.

Then there are a lot of instructional videos available for free on YouTube or Channel9 which can help you get started with PowerShell and they are a good way to get to see some PowerShell in action without opening the console yourself. Another good free course is available at Microsoft Virtual Academy: Getting Started with PowerShell 3.0 Jump Start which is taught by Jeffrey Snover and Jason Helmick. If you would like to stay up to date with the latest PowerShell developments the PowerScripting podcast might be for you, it is available on, The PowerScripting Podcast.

If you are ready to be overwhelmed by content you check out this entry on the TechNet Wiki, it lists most PowerShell, it is appropriately called Windows PowerShell Survival Guide or ‘the article formerly known as Automating IT Tasks with Windows PowerShell Overview’. This article contains most of the community blogs, book suggestions, forums, technical resources or to summarize a lot of the content can be found about PowerShell.

In addition to this information, a good PowerShell training course can go a long way to get started with PowerShell. If you feel I left out something or would like to add an additional resource I would be happy to add it to this to the blog post. I will continue to update this blog post as new resources become available so feel free to shoot a message at me when you find something that should definitely be included in this blog post.

For a full overview of all the links in this article, please refer to this table below it contains a categorized overview of all the links in this article:

PowerShell Websites Scripting Guy Blog
Twitter #PowerShell
PowerShell Books
Windows PowerShell Best Practices PowerShell in a Month of Lunches
PowerShell in Action List of Free PowerShell eBooks
PowerShell Online Communities
Technet Forums Reddit/r/PowerShell
Slack.PoSHcode PowerShell Forum Directory
The Scripting Games
2010 2011
PowerShell User Groups
PowerShell Digital Media
Youtube Channel9
Getting Started with PowerShell 3.0 Jump Start The PowerScripting Podcast
PowerShell Survival Guide
Windows PowerShell Survival Guide