Article ID: 2937529 - View products that this article applies to.
After you upgrade to Microsoft System Center 2012 R2 Virtual Machine Manager, when you view a virtual machine's properties on the Hardware Configuration tab > Network Adapterssection, the VLAN information that it displays is not current.
This issue occurs because of a problem in the logic used for filtering the VLANs in the UI.
This is a known issue in System Center 2012 R2 Virtual Machine Manager. A fix for this issue is scheduled to be included in a future update.