Syncing Edge Favourites

I have used Firefox for years and it's hard to find much fault with it. But since converting to W10 I've mainly been using Edge as I wanted to understand it better. I've only run into one site where it just won't work but otherwise it's been fast and stable and I quite liked it, except when it came to bookmark management. With Firefox I just have to enable sync and bookmarks on all my systems are aligned with the last system that had a change - simple. But Edge has no such feature. To sync bookmarks you have to save them to a file and then import that file to the system you want sync'd - except it doesn't sync! What it does do is add the imported bookmarks to all those already in the target system leaving you with the tedious job of editing out all the old ones that have been dup/triplicated. Until Edge gets a working sync then as far as I'm concerned it's unusable. Pity, as I quite liked it.

Maybe I'm missing something. Has anyone found an effective way of handling this problem?

This page gives very specific instructions for syncing Edge Favourites and is easy to follow. Unfortunately it doesn't work even though the two 1803 systems I'm using for testing are using the same MS account, have device sync ON, and have Favorites sync ON within Edge. Maybe it did work in earlier versions but it doesn't now. Other articles recommend the file export/import method I described above but that is completely unsatisfactory. I'm hoping someone here has discovered a working method.