Downgrading Active Directory Domain and Forest Functional Levels (Part 3)

Introduction In part 2 of the series we've successfully lowered the Forest Functional Level (FFL) and Domain Functional Level (DFL) to Windows Server 2008. The demonstration was completed in a forest where the Active Directory Recycle Bin was not enabled. In this final part of the series, I will first raise the functional levels back … Continue reading Downgrading Active Directory Domain and Forest Functional Levels (Part 3)

Field Notes: The case of the disappearing Name Server (NS) records

Introduction I recently assisted a customer with Name Server (NS) records in DNS, disappearing from their DNS zones. All of the Domain Controllers are configured as DNS servers, yet when viewing the NS records for the Active Directory-integrated DNS zones, only a few of these servers had NS records. The administrators manually re-added the NS … Continue reading Field Notes: The case of the disappearing Name Server (NS) records

Downgrading Active Directory Domain and Forest Functional Levels (Part 2)

Introduction In part 1 of this series, we established in theory that we can lower the Active Directory functional levels from the latest functional level to Windows Server 2008 R2, or even Windows Server 2008 if the Active Directory Recycle Bin is not enabled. I will now demonstrate how to lower the functional levels from … Continue reading Downgrading Active Directory Domain and Forest Functional Levels (Part 2)

Downgrading Active Directory Domain and Forest Functional Levels (Part 1)

Background With Windows Server 2008/2008 R2 approaching end of support, more organisations are upgrading their Operating Systems to the latest supported versions. Upgrading of Active Directory Domain Services (AD DS) requires a schema update, and ultimately raising the domain and forest functional levels. Customers are concerned that applications may stop functioning after raising the functional … Continue reading Downgrading Active Directory Domain and Forest Functional Levels (Part 1)