AUTOCORRECT-ONENOTE: FOR GODS SAKE PROVIDE AN OPTION TO TURN IT OFF!!

Agreed. It wouldn't be such a big deal if it didn't "re-correct" things that I specifically went back and "un-corrected". I work in a field with a lot of acronyms, one of them being EHR. Currently, the only way to type that in OneNote is to type it, let OneNote "fix" it, then go back over and fix it again. If I backspace to change it back, OneNote "corrects" it again as soon as I finish re-typing it.

I have the EXACT same problem with the EXACT same acronym (LOL) - electronic health record. Keeps changing it to HER. It gave me the ability to add ehr (lowercase) to my dictionary, but it does not underline EHR (capitalized) and and thus not give the ability to add to my dictionary. 

Who makes the product decisions like this?

This is becoming very frustrating, it's appalling that Microsoft STILL hasn't implemented any fixes for this issue. Every other office suite program has the ability to change autocorrect options and add your own autocorrect objects. Sometimes it gets so frustrating to deal with autocorrect in OneNote that I type up portions of my notes in Word and then paste them into OneNote, which is a laughable solution.

Microsoft, please add back the functionality you had in OneNote 2016 for autocorrect options. This is getting ridiculous.

It is so very frustating that AutoCorrect corrects things that I do not want it to correct. Like school abreviation BVE it will not accept, Changes it to BE. Lousy programming I am sure. Please fix this in MS 365 as I use it accros platforms that I do not have MS 2016 for. Too bad I guess I will use GoodNotes it at least listens to what I want.

Absolutely a non-response

This is the single most frustrating issue I experience about the whole Windows & Office ecosystem.

Every time I type revenue and tax (I'm an analyst) I get "revenu" and "taks".

What an absolute joke. I've tried workarounds by messing through regedit and system32. To no avail.

And it has been going on for years now. 

Maddening. Fix.

It's been a year and still this is an issue. I installed onenote yesterday and I have all the problems listed, and another: If I select all the text, rightclick and change the language from Norwegian to English, onenote still auto-"corrects" to Norwegian. Meaning I cannot write English notes, since words like "go" get "corrected" to "og" infinitely.