We have a business application installed on a virtual VM running Windows Server 2008 R2.
The software is configured to run as a RemoteApp through Windows Remote Desktop Services. All users on our WAN use the software this way and it works great.
We have a few users located in the same LAN as the VM and we would like them to be able to run the software directly across the LAN. So we set them up with mapped drives to the server and put the shortcuts on their desktops.
Here's where it gets weird. When they open the network shortcut directly it takes no less than 5 minutes to see the software login screen. Once the user logs in everything works great and it's very responsive. I've monitored the task manager during the startup and it looks like RAM usage for the EXE is increased very slowly from ~1MB to ~27MB, it is at this point that the software opens up on the screen.
I've tried this on both Windows 7 Pro and XP Pro. I've turned off IPv6 both on server and workstation. I've turned off TCP Chimney, RSS, and NetDMA on the server. I've updated the NIC drivers, put the software in the list of firewall exceptions both on the server and the workstations. Our physical server has dual Xeons and 48GB of RAM 8 of which are dedicated to the VM.
Not sure why this is so slow but I'd like to get it fixed and I'm running out of options.