Received a call from this number from "Microsoft Azure" asking questions about a recent subscription (valid). Caller ended the call quickly after learning that my subscription was not a business account, but a personal account. Caller already knew my mobile and email address. Likely a scam.

Not a scam, they are just trying to chase up business customers. I signed up for a free trial for an online course I was doing, and when the trial ended they called to ask if I needed help (ie, trying to sell me the software/account). Once I explained, the guy was very lovely about it and didn't pester me at all.

I called back number (02) 8046 6495 reached IVR but did not say the company name and you need to put an extension number for you to took to someone.

Had a missed call from this number. Only recently signed up to Microsoft Azure. Didn't speak to them so not sure if scam or not. If it is a scam, there's some major privacy leak happening at Microsoft.