did you installed windows ltsc and surprised there is no microsoft store don’t worry i will show you how to get this microsoft store again work in all windows 10 ltsc verisions
First
- download store and app installer files from here > Microsoft store
- then extract files from archive
second - Open Add-Store.cmd make sure run as administrator
- Wait till see done then exit you will find Microsoft store in Startmenu
!! the store will be older verision 2019 you can update it or use without updates !!
Enjoy 
