Intel NUC NUC6CAYH with its compact design placed behind the monitor is inconspicuous and should provide enough power for simple office applications.
The product is offered by us as standard with Ubuntu 18.04 as operating system and Xubuntu light-weight desktop. On the desktop, you'll find Google Chrome for surfing the web or other applications in your cloud.
Through RDP client (Remmina.desktop) you can connect to the windows server. There are no license fees.
If you plan to deploy several such mini-computers for your employees with the goal of keeping care costs to a minimum, have a look to our PXE-Boot-Server solution. Withit you can install many computers over the network, backup the installation state, if necessary restore the last state in about 5 minutes.
Further information about PXE-Boot-Server Solution