Book Image

Active Directory Administration Cookbook - Second Edition

By : Sander Berkouwer
Book Image

Active Directory Administration Cookbook - Second Edition

By: Sander Berkouwer

Overview of this book

Updated to the Windows Server 2022, this second edition covers effective recipes for Active Directory administration that will help you leverage AD's capabilities for automating network, security, and access management tasks in the Windows infrastructure. Starting with a detailed focus on forests, domains, trusts, schemas, and partitions, this book will help you manage domain controllers, organizational units, and default containers. You'll then explore Active Directory sites management as well as identify and solve replication problems. As you progress, you'll work through recipes that show you how to manage your AD domains as well as user and group objects and computer accounts, expiring group memberships, and Group Managed Service Accounts (gMSAs) with PowerShell. Once you've covered DNS and certificates, you'll work with Group Policy and then focus on federation and security before advancing to Azure Active Directory and how to integrate on-premise Active Directory with Azure AD. Finally, you'll discover how Microsoft Azure AD Connect synchronization works and how to harden Azure AD. By the end of this AD book, you’ll be able to make the most of Active Directory and Azure AD Connect.
Table of Contents (18 chapters)

Checking for and remediating lingering objects

A lingering object is an object that was tombstoned and then garbage-collected on all domain controllers but, after that point in time, the object was reintroduced by a domain controller that was restored from a backup, image, or snapshot that was older than the tombstone lifetime period.

You can periodically check for them.

Getting ready

Sign in to the domain controller that holds the PDCE FSMO role, using an account that is a member of the Domain Admins group.

Next, find the objectGUID attribute of the domain controller. Use the following command on an elevated Command Prompt (cmd.exe):

dsquery.exe * "CN=DC01,OU=Domain Controllers,DC=LucernPub,DC=com" -scope base -attr objectguid

Replace DC01 with the hostname of the domain controller.

We'll need the objectGUID attribute for the next commands.

How to do it...

Use the following command line on an elevated Command Prompt (cmd.exe) to scan for...