Welcome to the Centrify community.
Sounds like you're using the override feature in a pre-summer 2014 client version.
There were changes to our policy (due to abuse) that may affect your ability do do this configuration with the currently supported Centrify Express version.
Let's validate this first because the parameter that you may be using is this one:
For the full context, here's the announcement from our CEO from the summer of 2014
https://blog.centrify.com/introducing-centrify-server-suite-2014-1/
Please skim the configuration in your working system and let's validate this.
Bottom-line: If this is correct, you need the licensed version of the product.
R.P