How do I convey to my first choice that I got into my second choice

[Reza2019]

I just got into my second choice PhD in Business. 

I am still waiting to hear back from my first choice. Should I quickly email them about this offer? At the first choice school, should I email the POI or the admissions team? What do I say?

 

[zjppdozen]

Why you want to do that? No one will consider if or not you have been accepted by other programs in their admission process . 

[Fantasmapocalypse]

The only reason this could potentially matter is if you want to push for an increase in your funding/stipend/support offer from the Department of your Top Choice. I would not say a thing unless you think you have some kind of room to negotiate for something better, but as you've already mentioned the offer came from your second choice so nothing to do but wait IMO.

[DiscoTech]

Why would they care? If anything, you are now signalling how badly you want to attend their program.

[DRMF]

I generally agree with the above that, for now, it probably won't do anything and it'll only make sense if there's any funding negotiation going on.

I do want to note that for medical school, getting in a good/top tier school likely makes you seem more competitive to others. I know nothing about business schools, perhaps there's a chance that the same is true there (do you have info on that)? Is your "second choice" generally regarded as on par with your first choice?