Download Edge Favourites Backup.zip and unzip the folder into your OneDrive.

ie OneDrive\Scripts\Edge Favourites Backup

It contains the following Folders\Files:

Backups\

7za.exe (hidden)

Edge Favourites Backup.bat

Double click on the ‘Edge Favourites Backup.bat’ this will compress the 2 folders referenced in Backup/Restore Microsoft Edge Favourites Issue into a file in the Backups folder, the name is based on:

COMPUTERNAME_DATE_TIME.7z

ie: HYPER_14122016_231856.7z

It may look different depending on regional settings.