Book Image

Active Directory Administration Cookbook

By : Sander Berkouwer
Book Image

Active Directory Administration Cookbook

By: Sander Berkouwer

Overview of this book

Active Directory is an administration system for Windows administrators to automate network, security and access management tasks in the Windows infrastructure. This book starts off with a detailed focus on forests, domains, trusts, schemas and partitions. Next, you'll learn how to manage domain controllers, organizational units and the default containers. Going forward, you'll explore managing Active Directory sites as well as identifying and solving replication problems. The next set of chapters covers the different components of Active Directory and discusses the management of users, groups and computers. You'll also work through recipes that help you manage your Active Directory domains, manage user and group objects and computer accounts, expiring group memberships and group Managed Service Accounts (gMSAs) with PowerShell. You'll understand how to work with Group Policy and how to get the most out of it. The last set of chapters covers federation, security and monitoring. You will also learn about Azure Active Directory and how to integrate on-premises Active Directory with Azure AD. You'll discover how Azure AD Connect synchronization works, which will help you manage Azure AD. By the end of the book, you have learned about Active Directory and Azure AD in detail.
Table of Contents (16 chapters)

Modifying the tombstone lifetime period

When an object is deleted from Active Directory, it is not actually removed from the database, as this would hinder replication of the deletion. Instead, the object is tombstoned. This tombstone prevents the object from being usable (for logins, for example) and being visible in all, the common Active Directory tools. It also instructs the garbage collection process on each domain controller to remove the object from the database, once the tombstone lifetime period has expired.

Getting ready

To modify the tombstone lifetime period, you'll need to be signed in with an account that is a member of the Domain Admins group.