In my experience, the spelling checkers get confused by contractions. The possessive form is everyone's (the form everyones' is incorrect).example: The possessive of everyone is everyone's, in the same way the possessive of everybody is everybody's.
The indefinite pronoun 'everyone' is a singular pronoun. The indefinite pronoun 'everyone' is a singular pronoun that takes a singular verb.examples: What would be correct in this case and why?
Everyone who is coming will receive a gift. I have the following sentence: Would the noun following everyone's be plural? Joe got everyone's attention and started to speak.
There is a comprehensive article on the topic on grammar girl: Unless of course you’re a buddhist or a cat, in which case everyone has multiple lives and both would be correct, depending on context. The expression commonly used in both the affirmative and negative. Your deduction, that not everybody's cup of tea means not to everyone's liking, is absolutely correct.
Should it be everyone's, everyones' or everyones? There are actually two issues concerning this topic: Are the words everyone and everybody singular or plural? An example would be it flew over everyone's heads, or it flew over everyone's head.