What drove Interconnect$-$Communications to consider using cloud computing as an alternative to their current various subsidiary and core models for application hosting?

What are additional considerations that Interconnect$-$Communications needs to consider, and fully vetted to ensure that their applications and services can migrate to a centralized hosting model in the public cloud $($think people, process, and technology$)$

As an international corporation what does Interconnect$-$Communications need to consider from a controls perspective to ensure the security of their customer data, and potential exposures to cloud providers that may bring in regulatory or financial risk $($see reference links below for some ideas$)$