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Avatar photoRobert Allen

Founder, Owner, and Product Development at Active Directory Pro.

Robert has extensive experience in Windows System Administration, Office 365, Azure, Cisco switches and routers, VMWare, PowerShell, L2, and L3 networking, network security, Cisco ASA, and Fortigate firewalls. Robert Allen holds several IT certificates including, MCSE, MSA, CCNA, CCNA Security, and CompTIA Security +.

Since launching Active Directory Pro, Robert has published several detailed how-to guides and best practices that have become very popular. Active Directory Pro is now one of the most popular resources for information on Active Directory, Microsoft Servers, and related technologies.

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November 12, 2021

Connect to Exchange Online with PowerShell (MFA Support)

In this guide, you will learn how to connect to exchange online with PowerShell. These steps will work MFA or … Read more

November 11, 2021

How To List Installed PowerShell Modules

Do you need to get all installed PowerShell Modules? No problem. You can easily find all installed modules using the … Read more

Find office 365 mailbox size

January 11, 2025

Check Office 365 Mailbox Size

In this guide, I’ll show you two options on how to check the mailbox size in Office 365. The default … Read more

January 12, 2025

Easily Find Local Administrators on all Computers

In this article, you will learn how to get members of the local administrators group using PowerShell and the AD … Read more

how to find inactive users in active directory

January 11, 2025

How to Find Inactive User Accounts in Active Directory

In this guide, I’ll show you how to find inactive users in Active Directory with PowerShell. I’ll also show you … Read more

October 23, 2024

How to Demote a Domain Controller (Step-by-Step Guide)

Do you need to demote a domain controller? Is your domain controller dead and do you want to manually remove … Read more

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Recent Articles

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