Did you not read the following quote from the first post?
Originally Posted by John Clark
...Important: If you're still connected to a company BES, and simply want to install the latest and greatest third party application I would not recommend this approach. Talk to your BES administrators and ask them to grant you the appropriate rights. There are two problems in using this guide to bypass your company's security policy. First, whenever you reconnect to the company server, your security settings will revert back to how they were. Second, and perhaps more importantly, you run the risk of getting fired.
You need to connect your device to Desktop Manager on your work computer connected to your work email. If Desktop manager isn't setup properly to acquire an online connection with your email profile then you're going to have to contact IT to reactivate on the BES.
It's posted in this thread many times about doing this when you are still connected to a BES. it's a BAD idea.