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Michael Reinders

Petri Contributor

Michael has been an IT Pro since 1998. He has worked predominantly in the Windows world including client and server operating systems, on-prem systems engineering (AD, DNS, etc.), and over the last ten years or so has embraced and immersed himself in all things Microsoft 365 - including Exchange Online, SharePoint Online, Teams, OneDrive, and Microsoft Entra ID. He has written articles here on Petri based on these technologies. Michael strives to help other IT Pros with getting more efficient (especially with PowerShell) in their day-to-day tasks and offering solid assistance on larger projects.

LATEST

Microsoft 365 Apps

How to Install Office LTSC 2021

Last Update: Jun 07, 2025

Office LTSC 2021 is the latest perpetual version of Office for commercial and government customers. This how-to guide will detail all the steps you need to follow to install Office 2021 LTSC on your computer. Installing Office LTSC 2021 will give you access to Word, Excel, PowerPoint, Outlook, and OneNote, as well as Access and…

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Windows

How To Install Active Directory Users And Computers (ADUC): A Step-by-Step Guide

Last Update: Nov 05, 2025

In this guide, we’ll show you how to install Active Directory Users and Computers (ADUC) and provide an overview of its basic functionality, enabling you to manage Active Directory effectively. Active Directory Users and Computers (ADUC) is built as an add-on for the Microsoft Management Console (MMC) and is the go-to tool for IT Professionals…

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Windows

How to Fix The “Trust Relationship Between This Workstation And The Primary Domain Failed” Error

Last Update: Jun 18, 2025

The “trust relationship between this workstation and the primary domain failed” error means that the computer cannot access a network because it is offline, or that it has lost its membership to the Active Directory (AD) domain. This guide will help you understand what’s happening behind the scenes when this error occurs, and we’ll go…

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Windows

How to Use the Icacls Command to Manage File Permissions

Last Update: Feb 19, 2024

Icacls is a Windows command-line utility that IT admins can use to change access control lists on files and folders. One of the most common tasks that an IT Pro or system administrator performs is modifying permission on a file server. Using the icacls command is a very efficient way to do that, and we’ll…

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PowerShell

How to Install Active Directory PowerShell Module

Last Update: Jun 12, 2025

In this guide, we’ll show you how to install the Active Directory PowerShell module on almost any version of Windows. Installing the Active Directory (AD) module in PowerShell offers IT pros convenient and secure remote access to administer their AD environments, all without having to interactively log into their domain controllers. Microsoft does not recommend…

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Windows

How to Fix the “Remote Desktop Connection – An Internal Error Has Occurred” Error

Last Update: Jun 06, 2025

The “Remote Desktop Connection: an internal error has occurred RDP” message can show up on a Windows PC when the Remote Desktop Protocol (RDP) client is unable to make a connection with an RDP server. The error is due to one or more configuration issues related to RDP and security. In this guide, we’ll help you…

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Cloud Computing and Security

How to Install SQL Server 2022

Last Update: Jun 27, 2025

SQL Server 2022, the latest release of Microsoft’s relational database product is nearing the finish line. In this guide, we’ll show you how to install SQL Server 2022 with the default, typical setup configuration. Planning and prerequisites Before we get started with the installation of SQL Server 2022, the first thing to accomplish is to…

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Windows

How to Fix the “An Active Directory Domain Controller for the Domain Could Not Be Contacted” Error

Last Update: Jun 25, 2025

When trying to join a computer to an Active Directory domain, you may sometimes encounter the “an Active Directory Domain Controller could not be contacted” error. When an active directory controller cannot be contacted, it can hinder your ability to join a computer to the network. In this post, I’ll explain the different DNS and…

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Windows

Using GPUpdate to Manage Group Policy

Last Update: Jun 08, 2025

With GPUpdate, administrators can update Group Policy settings from a central location and set configuration settings for computers in an Active Directory domain. In this guide, I’ll show you how to use GPUpdate to refresh local and Active Directory–based Group Policy settings. I can’t tell you (accurately) how many times I have typed ‘gpupdate /force‘…

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Network Security

How to Delete a Protected OU in Active Directory

Last Update: Jun 06, 2025

As your organization’s logical layout changes, you may need to delete OUs in Active Directory (AD) from your domain controllers. In this post, we’ll show you two different ways to delete protected OUs (Organizational Units) and what minor roadblocks you may come across while doing so. Why you cannot delete protected OU in Active Directory…

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Network Security

How to Access Active Directory

Last Update: Jun 08, 2025

If you work in IT, you’ve probably taken a good look at Microsoft Active Directory. But to set up and manage Active Directory (AD), you need access to the AD administration tools. Understanding how to access Active Directory is crucial for IT professionals working with Windows environments. In this guide, you’ll learn how to open…

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PowerShell

IT Expert Answers: How to Check Your PowerShell Version

Last Update: Jun 18, 2025

Whether you’re a PowerShell pro or just starting out, it’s useful to know how to check your PowerShell version. We’ll explain how to do that in this guide. How to check your PowerShell version Let’s quickly check the version of PowerShell installed on your device: For more details on the different ways to check the…

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