When you open the Application Virtualization (App-V) Client Management snap-in on a Windows Server Computer running the App-V Client for Remote Desktop Services, you get the following error:
MMC could not create the snap-in.
MMC could not create the snap-in. The snap-in might not have installed correctly.
Name: Application Virtualization Client
This may happen if you attempt to maintain multiple connections to the App-V client through the client administrative snap-in/console under the same administrative account when accessed from multiple RDP sessions.
You can have one console connection alongside a single RDP connection – even under the same user account. The issue only arises when you are attempting a second instance of the MMC snap-in from a second RDP session under the same user account.
This issue is known and considered by design.
Microsoft Application Virtualization 4.5 for Terminal Services, Microsoft Application Virtualization 4.6 for Terminal Services, Microsoft Application Virtualization 4.6 for Terminal Services Service Pack 1