Observed this issue last week. The VLAN ID in the Network Interface details inside the properties of a VM is not showing up as expected.
Here is the scenario.
SCVMM 2012 R2 with Windows Server 2012 R2 HyperV.
VMs are deployed and all works well. The Virtual Switch is configured as a Trunk and each VM needs to specify the VLAN ID. All well, However the VLAN ID of a VM is not getting displayed in the VMM console.
However, If we verify the VLAN ID of the same VM over this command let, its properly configured.
Now lets try to change the VLAN ID through SCVMM Console.
I changed the VLAN ID to 66 and here is the confirmation of the job status.
After this change, I verified that the new VLAN got updated on the VM using the commandlet.
Going back to the SCVMM, The VM properties still don’t show that VLAN id is enabled and configured.
However, if we go to the connection details, VLAN ID is displayed.
This may be a minor bug. I have opened a case with the Microsoft support. I will update once I get more details on this.