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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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get ad manager details with powershell

July 31, 2024

Get Manager Details for each AD User

In this post, you will learn how to get the Manager details for accounts in Active Directory. To get a … Read more

get members of large active directory groups properties

January 11, 2025

Get Members of Large AD Groups (5,000+)

In this guide, I’ll show you how to get members of large Active Directory groups using PowerShell

restore deleted ad user

April 4, 2025

Restore Deleted Active Directory User

In this article, I’ll show you how to restore deleted Active Directory user accounts. You can recover deleted AD Users … Read more

check ad tomestone lifetime

May 21, 2024

How to Check Tombstone Lifetime of Active Directory

In this guide, I’ll show two options on how to check the Tombstone Lifetime in Active Directory. Option 1. Check … Read more

useraccountcontrol attribute in active directory

March 17, 2024

UserAccountControl Attribute Values

In this article, you will learn about the UserAccountControl attribute in Active Directory. In addition, I’ve created a table that … Read more

July 21, 2024

Find Accounts with Password Not Required (Blank Password)

In this post, you will learn how to find Active Directory user accounts with PasswordNotRequired set to true. When a … Read more

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