As promised, we're back to the who versus whom debate, or as discussed on "The Office," the whoever versus whomever debate.
Grammar Girl breaks this down for us in a very simple way: "Like whom, the pronoun him ends with the letter M. When you're trying to decide whether to use who or whom, ask yourself if the hypothetical answer to the question would contain he or him. If it’s him, you use whom, and they both end with M."
You would follow the same principles with she (who) and her (whom) as well as they (who) and them (whom). See how them and whom both end in M -- another handy trick for remembering.
WHICH ANSWER IS CORRECT?
• Who is that for?
• Whom is that for?
When looking at these questions, the answer would be something like, that's for him (or her, or them), so the proper answer would be whom.
• Who is going to the store?
• Whom is going to the store?
The answer to this question is likely to be he is (or she is, or they are), so the answer would be who.
So to end the office debate, Ryan says he wants Michael to know the presentation so that he can communicate it to whomever. Who would he be communicating it to? Them. So Ryan wins this round — although Pam and Toby were the only ones who could explain why Ryan won, so perhaps it was an accidental victory.
For a more in-depth explanation, check out Grammar Girl's post or Grammarly's post.