The only working solution is to switch to Linux. But I have my suspicions that this option does not suit you. Therefore, it remains only to carry out user conversation that no need to do so. Another universal solution
at the moment, I do not know. Even if you have the latest Windows 10 and you removed the limit via the registry or group policy, it still will not work properly. Yes, the guide will allow you to manipulate files and folders, but even the newest Excel cannot open a spreadsheet and Acrobat Reader will generate an error when opening the PDF file.
You can use crutches. For example, to pick up ON that correctly digest a long journey. Or reduce nesting by using the command
subst. Or mount the folder as a network drive. Or to teach the user to use the UNC format
\\?\Drive:[\Directory][\File]. Or change the way file storage. Or...