Active Directory Issues and Fixes

Where broken AD meets clean solutions; no fluffs invloved.

01  

Why this
series?

We skip the theory and go straight to what matters.

This series takes complex AD issues such as failed trust relationships, broken replications, and GPO issues, and breaks them down into simple, actionable insights.

No theories. No conspiracies. Just plain facts with real wins.

02  

For
whom?

If you’re a security administrator who wants real answers, you’re in the right place.

We cover the what, why, and how; so you not only fix the issue, but also understand it and prevent it next time.

03  

About the
author

What started as a fun side project to decode AD turned into a deep-dive journey of broken DCs, missing GUIDs, and “why isn’t this replicating?”.

Now, those lessons are packed into battle-tested fixes so you don’t have to learn them the hard way.

1

Group Policy headache? Fix login issues in no time!

From fixing SYSVOL folders to WMI filters, we've got the quick fixes to ensure your users can log in smoothly.

 
2

Fixing Active Directory Replication Failures

From fixing time sync and lingering AD ghosts to dealing with stale Knowledge Consistency Checker (KCC) caches, we've got all the tips.

 
3

Why and what happens when Kerberos fails to authenticate?

From tackling oversized tickets and missing SPNs to resolving clock skew drama and double hop headache, this guide has the tools you need.

 
4

Authentication failures

This cheat sheet is packed with quick fixes and pro tips to get your users back in, passwords verified, and systems running smoothly.

 
5

DNS issues holding logins hostage?

This cheat sheet is packed with quick fixes to help you track down misconfigurations, restore order, and get users to log in smoothly.

 
6

Trust relationship issue

When your computer and the DC stop looking at each other, it might be due to a password misalignment, and we've got the perfect reconciliation plan!

 
7

SYSVOL version mismatch

This guide covers common SYSVOL issues, why they occur, and how to fix them quickly.

 
8

Global Catalog not available

The Global Catalog is your Active Directory's search engine without it, logins fail, lookups return nothing, and applications struggle to find user info.