Do not believe this is possible with robocopy itself. However,
You could test for if each folder exists then run the robocopy command if it does, and not if it does not. This is the IF command.
IF EXIST C:\users (Echo Folder Exists) ELSE (Echo Failed)
You could combine that with a FOR folders command but the starts to get complex if you want to compare it with a folder on different volume and if that exists. That is beyond a general Windows 10 question. You could post it somewhere else, I find a
lot of results on the http://stackoverflow.com/ forum when I search for command prompt stuff so it that may be worth a look.