Dell Wyse Management 1.3

Hi

I keep having trouble with the management suite 

I was running version 1.2 and it stopped passing out the config or any updates 

Setup a fresh install of 1.3 on a different server and un-enrolled all systems, adjusted the WMS key in DNS 

They all correctly picked up the new server and single RDP icon policy 

Around 30 days later, machines are starting up and have dropped my policy + icon but are still showing as enrolled and up to date 

The only way to get the icon back is to un enroll from the box and restart 

What have I done wrong here ?