Start NFS server without UID and GID of Unix directory

I'm trying to set up a NFS Server on Windows to map a folder of a Unix system connected to the same network. The second step in the tutorial How to set up a free NFS server on Windows 10 (sections 4 and 5) says to edit a registry by adding the UID and GID of the Unix directory, but that system is not accessible by me to get their IDs. Is there another way to finish the map the directory so I can place a file in it from Windows (maybe some wildcard values for the registers)?