A few months ago, our whole environment went Home-office, our infrastrtucture was prepared but our collaborators not.
We discover high latency connections, dozens of time-outs and even no connection at all from various homes.
The sollution was to dig deeper on the combination we were using of firewall, VPN client and machine hardware/SO.
After a few research I've discovered a solution for this problems using a powershell script that released a fabric limitation from our network servers to hunger CPU power in low speed/ high latency networks, after a few tests we were able to solve all the connection issues without inffering into machines performance, which basically enabled our employees to work without ANY issues.