This is really an urgent information that has been sent out today to all WSM customers. Dell Wyse informed them to apply a just released hotfix to their WSM 4,x and 5.x servers as soon as possible but before beginning of June. The reason behind this, is an issue within the licensing mechanism. On June 2nd 2013 each license that has been applied to the servers will become invalid. The WSM server will interpret all licenses after that date as expired, resulting in stopping all functions of the server and no images are provisioned then.
To avoid that bevavior you should install that hotfix directly to all of your WSM server. The hotfix can be downloaded from the www.wyse.com download site (https://appservices.wyse.com/pages/serviceandsupport/support/downloads.asp).
But what about customers still running WSM 3.x or earlier? These customers have two options. First is, if they have a valid maintenance, to upgrade their environment for free to WSM 5.01. If they don't have a maintenance then they either have to pay for the update or contact Wyse to get a new, free, valid and working license. This is, what you should do in this latter case:
a) Log in to the WSM admin console and click on the "About" link on the WSM admin portal (top right corner).
b) Take a screen shot of this page or using the snipping tool (windows 7 and higher) or similar tools take a screen snippet of the "Product License Information"
c) Paste this screen shot/snippet in an email and send it to email@example.com. Dell Wyse will respond to you with a new license file and instructions for installation
Less than 3 weeks to go. So hurry up and patch your environment.