I'm sure they get a lot of hang ups, but there is a clear difference between someone who can barely speak English calling you from a call center "to discuss the

I'm sure they get a lot of hang ups, but there is a clear difference between someone who can barely speak English calling you from a call center "to discuss the account" or whatever, and a native speaker calling from (presumably) their home or a quiet office, using your name, and who already knows what products within Azure you're using. It's pretty obvious from the get go it's not a scam.