Tag Archives: Windows Server

PS0159: The operation is not supported at the current Farm Behavior Level ‘1’. Raise the farm to at least version ‘2’ before retrying.

By | 19th February 2019

When running AD FS on a Windows Server 2016 you might get the error message: PS0159: The operation is not supported at the current Farm Behavior Level ‘1’. Raise the farm to at least version ‘2’ before retrying, when you try to enable some new services such as the ESL (Extranet Smart Lockout). This can… Read More »

How to downgrade the Domain and Forest functional level

By | 24th May 2017

With older versions of Windows Server it was not possible to downgrade the domain and forest functional level once upgraded. However this has changed since Windows Server 2012R2, using PowerShell you can now downgrade the Domain and Forest functional level. To do so follow these steps: 1. Log on to the domain controller as domain… Read More »