Greetings friend, first of all I apologize for responding a little late, your comment is very valuable, endogenous microorganisms can be known in different ways depending on the region, I have seen name as functional microorganisms, efficient microorganisms among other names, what should be clear is that they are microorganisms that come from natural ecosystems and play a key role in agriculture.
Thank you for your recommendation, have a great start of the week.
The correct spelling is Indigenous not endogenous.
Also you must be referring to EM-1 or EM-5, a company out of Japan selling a product called effective microorganisms. Its basically just a few specific lacto bacteria strains.
Try doing a search on the internet with the term Indigenous Microorganisms.
English is clearly your second language. Trust me look it up and learn more.