How to organize remote work of employees?

Question

Windows

In the light of recent events, a task has been received to organize remote work for ~ 700 users.
Introductory:
1. User workstations - Windows 7 / Windows 10
2. There is a free server
3. I won’t tell you about network hardware, I work for a couple of days, another department is engaged in networks
4. There is no money) (well, they are, but there is no time for something buy)
5. Must be done yesterday
6. Access to the user's workstation - only RDP

Such is the case.
As an option, we are thinking about Remote Desktop Gateway, but so far there are difficulties with the connection.

What do you suggest?

Answer 1

My solution (has been working for a long time). Works on everything that moves - Androids, Windows, Macs.
SSH tunnel with passcode protected keys.
-set up a server with access to the Internet on a white IP
-cut off the entrance as root
-cut off the shell -attach
ssh to a random port -make
personal accounts for all users, generate keys and the private part of the key.

plink -P ПОРТ -l ЛОГИН -i КЛЮЧ_ЗАКРЫТЫЙ.PPH  -N -L 23389:МАШИНА_КЛИЕНТА_В_ОФИСЕ:3389 АДРЕС_ШЛЮЗА_В_ИНЕТЕ
pause

The client cuts in a batch file, enters the passcode from the key and connects to an address like 127.0.0.1:23389, and SSH tunnels it where it needs to.
There are procedures that allow you to generate keys without employees visiting the office.

Answer 2

as mentioned above ssh +rdp https://habr.com/ru/post/319158/
and vpn with simple interface for clients such as softether vpn and analogues for openvpn

Answer 3

TS'a has 700 users and a purely Windows network, and you advise him some crutches with SSH and VPN ...
Deal with RD Gateway - there's nothing complicated. Works like clockwork. Unless a couple of times I had to manually install protocol updates on Windows 7.