What happens when you click ‘My friend’s been hacked’?

So I was using my Outlook.com and I was wondering what the 'My friend's been hacked' button will do - so, being inquisitive, I clicked it to see what would happen, expecting a confirmation box (which I would cancel), but none appeared. It was for a Google Plus notification, I removed it from junk anyway - I just want to know what else will happen? Will Microsoft email me and I'll email them telling them it was an accident? Just want to know nothing else will come from it, like if emails from that address would be blocked. Thanks