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PoSh Chap

Musings on the splendour of PowerShell...

10 Years of PowerShell!

Is it really 10 years? Time passes so fast. I was a Sys Admin when PowerShell was released, in...

Author: Ian Farr [MSFT] Date: 11/25/2016

Days of Service and Service Anniversaries

Not an exact science*, but PowerShell and Active Directory can be used to arrive at the length of...

Author: Ian Farr [MSFT] Date: 11/18/2016

All Properties AND a Constructed Attribute? Get out of here!

Can you retrieve all of an object's properties and request a constructed attribute at the same time?...

Author: Ian Farr [MSFT] Date: 11/11/2016

Active Directory Object Parent GUID Fun!

Another week of AD Object GUID fun! I've created an abridged version of a previous post, so crack...

Author: Ian Farr [MSFT] Date: 11/04/2016

Active Directory Object GUID Conversion Larks!

What fun I have in the hotel of an evening! Gym, meal and then Active Directory object conversion...

Author: Ian Farr [MSFT] Date: 10/28/2016

RegEx for SMTP Address Validation

Last week I opined about the cloud. None of that this week, you'll be glad to hear. Straight to...

Author: Ian Farr [MSFT] Date: 10/21/2016

RegEx for Password Complexity Validation

I often hear on-premises infrastructure described as 'legacy'. When you consider the innovation,...

Author: Ian Farr [MSFT] Date: 10/14/2016

Back to Basics: Comparing Property Values Between PS Custom Objects

You have two PS custom objects. They contain the same property names. You want to compare the values...

Author: Ian Farr [MSFT] Date: 10/07/2016

Back to Basics: Multiple Statements with Try / Catch

A customer question this week. What would happen if they chained a number of statements in a try...

Author: Ian Farr [MSFT] Date: 09/30/2016

Security Focus: Check Credential Guard Status with PowerShell

In Windows 10 Enterprise and Windows Server 2016, Credential Guard uses virtualization-based...

Author: Ian Farr [MSFT] Date: 09/23/2016

One-Liner: Use PowerShell to Verify Domain Controller Location

It's generally a bad thing if a domain controller isn't in the domain controllers OU. For example,...

Author: Ian Farr [MSFT] Date: 09/16/2016

Security Focus: Use PowerShell to List Authentication Policy Silo Members

A while back, I wrote a couple of posts on implementing Authentication Policies and Authentication...

Author: Ian Farr [MSFT] Date: 09/09/2016

Ooooh... PnP Cmdlets & Surface Book Fun!

PowerShell just gives and gives and gives. Whilst looking for automated UEFI management options for...

Author: Ian Farr [MSFT] Date: 09/02/2016

One-Liner: Use PowerShell to Get GPOs Containing User Settings

Last week we used Get-ADObject to find GPOs based on their flags attribute. We targeted GPOs that...

Author: Ian Farr [MSFT] Date: 08/26/2016

Use PowerShell to Get GPO Status Flag

Here's an interesting little exercise in using Get-ADObject to see which parts of a Group Policy are...

Author: Ian Farr [MSFT] Date: 08/19/2016

Security Focus One Liner: AD Privileged User and Password Doesn't Expire

I get to perform security assessments against Active Directory. It's always fascinating. There's a...

Author: Ian Farr [MSFT] Date: 08/12/2016

Security Focus: Orphaned AdminCount -eq 1 AD Users

AdminSDHolder and AdminCount have appeared in a few recent posts. In fact, in addition to this post,...

Author: Ian Farr [MSFT] Date: 07/29/2016

Back to Basics: Change an Attribute on a File

Today's post is short and sweet... just like the PoSh Progeny! Here's a short and sweet way to...

Author: Ian Farr [MSFT] Date: 07/22/2016

Security Focus: AD Objects Configured as AdminCount -eq 1

Let's go! In Active Directory, AdminSDHolder is an object in each domain partition's system...

Author: Ian Farr [MSFT] Date: 07/15/2016

Parameter HelpMessage Arguement

I taught a PowerShell course the other day. I hadn't delivered that content for a while. I came to a...

Author: Ian Farr [MSFT] Date: 07/08/2016

Use PowerShell to Decipher GPO Version Information

A Group Policy is made up of a GPC (Group Policy Container) and a GPT (Group Policy Template). The...

Author: Ian Farr [MSFT] Date: 07/01/2016

Security Focus: Check the AdminSDHolder ACL - Part 2

Two weeks ago we used PowerShell to report on the AdminSDHolder ACL. We ended up with a CSV file of...

Author: Ian Farr [MSFT] Date: 06/24/2016

MS16-072 - Known Issue - Use PowerShell to Check GPOs

UPDATE - 30/06/2016 Official detect and fix script released. See here: Powershell script to adjust...

Author: Ian Farr [MSFT] Date: 06/16/2016

Security Focus: Check the AdminSDHolder ACL - Part 1

In Active Directory, AdminSDHolder is an object in each domain partition's system container. It has...

Author: Ian Farr [MSFT] Date: 06/10/2016

Back to Basics: Is my Parameter Value from the Pipeline?

I was asked how to check if a supplied parameter value has come from the pipeline. I came up with...

Author: Ian Farr [MSFT] Date: 06/03/2016

Security Focus: Reporting on Interesting UserAccountControl Values

I've talked about various UserAccountControl values in previous AD security focused posts. Recently,...

Author: Ian Farr [MSFT] Date: 05/27/2016

Configure an Azure Automation Account - An Addendum

Recently, I wrote a series of articles on getting started with Azure Automation. Configure an Azure...

Author: Ian Farr [MSFT] Date: 05/20/2016

Back to Basics: A Casting Quandary

I could hear the screams of frustration from miles away! Not too long after my Skype for Business...

Author: Ian Farr [MSFT] Date: 05/13/2016

Perform a Basic o365 Inventory with PowerShell

An old customer wanted an insight into a little used o365 test tenant. I made sure they had a Global...

Author: Ian Farr [MSFT] Date: 05/06/2016

Security Focus: Report on Protocol Transition

A couple of weeks ago I showed how to report on Constrained Delegation. This week, I'm going to talk...

Author: Ian Farr [MSFT] Date: 04/29/2016

Security Focus: Report on Unconstrained Delegation

Last week I showed how to report on Constrained Delegation. This week, I'll show you how to...

Author: Ian Farr [MSFT] Date: 04/22/2016

Security Focus: Report on Constrained Delegation

It's a subject that's been written about on numerous occasions. However, there's not...

Author: Ian Farr [MSFT] Date: 04/15/2016

Active Directory - Parsing a 'Multi-Line' Description Property

Interesting one this... A customer had some information they needed to obtain from the description...

Author: Ian Farr [MSFT] Date: 04/08/2016

Even Newer and Even More Improved Formula: Build an Active Directory Forest in Microsoft Azure (IaaS) II

Now, there's a title! Why have I felt the need to blog about this again? Well, a little while...

Author: Ian Farr [MSFT] Date: 04/01/2016

Back to Basics: Use PowerShell to Search Servers for Specific Software

An old acquaintance, Mr. Rupert Torquil-Smythe Esq. (yes, it is he), recently wanted to know whether...

Author: Ian Farr [MSFT] Date: 03/25/2016

Back to Basics: Use PowerShell to Generate a List of Week Commencing Dates

The other day I need a year's worth of 'week commencing' dates to complete a work-related task....

Author: Ian Farr [MSFT] Date: 03/18/2016

Configure DNS Dynamic Update Credentials for DHCP with PowerShell

It's an old story... client meets network, client falls in love obtains IP address from DHCP...

Author: Ian Farr [MSFT] Date: 03/11/2016

ADMirror PowerShell Module

Following on from my post about Test Lab Hydration, I've just released a Dump AD Groups script...

Author: Ian Farr [MSFT] Date: 03/04/2016

Configure an Azure Automation Account - Part 3 - Validation Run Book

Welcome back! This is part three of a three part series to get you up and running with Azure...

Author: Ian Farr [MSFT] Date: 02/26/2016

Configure an Azure Automation Account - Part 2 - Credentials and Variables

Welcome back! This is part two of a three part series to get you up and running with Azure...

Author: Ian Farr [MSFT] Date: 02/19/2016

Configure an Azure Automation Account - Part 1 - Start Me Up

Welcome to part one of a three part series to get you up and running with Azure Automation. The end...

Author: Ian Farr [MSFT] Date: 02/11/2016

Use PowerShell to Restrict DNS Resource Record Registration

I'm going to start with the PowerShell. Actually, in writing that sentence, I realise I've...

Author: Ian Farr [MSFT] Date: 02/04/2016

One-Liner: Generate a Random Password

Always learning. Forever delighted. Happily surprised. That's using PowerShell for you... well,...

Author: Ian Farr [MSFT] Date: 01/29/2016

One-liner: Use Get-ADObject to Find Authorised DHCP Servers

The DHCP PowerShell module has the Get-DhcpServerInDC cmdlet to show you the DHCP servers that have...

Author: Ian Farr [MSFT] Date: 01/22/2016

Automagically Keep the Azure PowerShell Module Up-To-Date

I'm a tidy(ish) person. Tidy desk, tidy mind and all that jazz... as someone once said! I like...

Author: Ian Farr [MSFT] Date: 01/15/2016

One-Liner: Is my Laptop Connected to a Domain Controller?

I'm a remote worker - my work colleagues think I'm rather distant! Actually, what I meant...

Author: Ian Farr [MSFT] Date: 01/08/2016

PowerShell and certutil.exe

An old customer got in contact recently. Could I help combine some PowerShell with certutil.exe to...

Author: Ian Farr [MSFT] Date: 01/01/2016

Happy Holidays - Festive Fun!

DISCLAIMER: my idea of fun and your idea of fun may well differ! Ho, Ho, Ho! Here's some...

Author: Ian Farr [MSFT] Date: 12/25/2015

Use PowerShell to Add a Vendor-Specific Class to Windows DHCP

I'm helping a customer migrate from an Infoblox appliance to Windows IPAM. One of the tasks...

Author: Ian Farr [MSFT] Date: 12/18/2015

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