KB: A user cannot be assigned to a renamed virtual machine in a personal VDI collection in Windows Server 2012 (2815795)

A new Microsoft KB article (2815795) has been released today related to renaming a personal assigned  VDI on Windows Server 2012.

“…Consider the following scenario:

• You have a virtual machine in Windows Server 2012.
• The virtual machine is assigned to a user in a personal virtual machine collection.
• You rename the virtual machine.

In this scenario, the virtual machine is displayed as not assigned after you rename it. When you try to assign the user to the renamed virtual machine, the assignment fails, and the user cannot be assigned to any virtual machine. Additionally, you receive the following error message:

Exception: Object reference not set to an instance of an object…”

“…To work around this problem if you rename an existing virtual machine in a collection, follow these steps:

1. Remove the user from the virtual machine.
2. Remove the virtual machine from the collection.
3. Rename the virtual machine by using the Hyper-V console.
4. Add the renamed virtual machine to the collection.
5. Assign the user to the renamed virtual machine…”

Source: http://support.microsoft.com/kb/2815795/en-us?sd=rss&spid=16526