How to exclude empty folders from backup?

Plz help me with my Windows backup configuration.
I want to backup only *.pst files on Windows machines. They are usually located in “C:\Users\User\Documents\Файлы Outlook”, but i want *.pst from all users current or new, so i configured server this way:

include in backup: *.pst

default backup locations: C:\Users\

Thus i got backup i needed but it has a lot of empty folders in it. Actually it has all the folders that are in “Users” folders like “Photos” or “Desktop”, but since they do not contain any .pst files they are empty. Is there any way to get only “Файлы Outlook” directories in backup?