Using the New Outlook for Mac features in business environments
More time-wasting but I found a partial solution:
I reverted to Legacy Outlook and saw that both check and correct spelling and grammar were active, even though I never had it set that way when I was using it, before New Outlook.
I unchecked all the spelling, grammar and autocorrect choices, then went back to New Outlook. Now, at least I don't see red squiggles in my emails while composing.
The changes I made do NOT however stop autocorrect from messing up my subject-line text. Why is this app not allowing me to stop autocorrect in the subject line? Sheesh.
Microsoft, surely you can do better! Why did I have to waste so much time just to make this change back to the way I had it before you guys messed it up!