Re: Hosted on Azure
icloud is mainly run on AWS, with some on Azure. In fact, according to various news outlets, its a fairly large bill each month - $30M / month
https://9to5mac.com/2019/04/22/icloud-apple-amazon/#:~:text=Amazon%20Web%20Services%20(AWS)%20are,be%20more%20than%20%2430%20million.&text=Apple%20also%20recently%20signed%20an,over%20a%20five%2Dyear%20period.