Not sure we have enough info/access yet to get to an answer but worth a try anyhow!
The company I work for has been bought recently and we are dealing with an infrastructure we aren't super familiar with just yet but have been tasked to help with the issue.
Branch offices access virtual desktop sessions hosted on a server at the HQ(NY).
One branch in our area (Denver) is having performance issues with their remote sessions. Performance is reportedly fine at the rest of the offices. We are by some margin the furthest away so I sort of suspect some kind of latency issue.
Everything in the remote session is laggy at this location. For example load a webpage with a photo slider at the top and each change ends up being drawn line by line.
There is a site to site VPN between the locations provided by SonicWALL devices.
Pings to edge devices and the server being accessed have so far seemed decent to good.
Have checked traffic on the internet connection and so far it doesn't look like they are over running the connection capability.
Also ran an RD session to a host in AWS West region which worked without trouble from the same location, internet, piece of hardware. Not sure this tells us a whole lot though since there is still a lot changed from one situation to the other.
What other steps can we take to find the issue and stamp it out?