The cloud is more than a buzzword these days. Companies large and small are looking skyward for critical business functions that were once seen as untouchable—and they’re doing it for the timehonored reasons of reducing cost and complexity. The prevailing wisdom not long ago was that a critical application like email had to be housed in a company data center where teams of expensive IT staff members could babysit it and do little else. But that’s all changed in the past few years As companies look to focus on what they do best and leave certain tasks such as email and other resource-intensive activities that aren’t a core part of their business to experts in the cloud. That doesn’t mean companies can just shake hands with a cloud email provider and leave the driving to them. In addition, there are (sometimes) unfounded concerns about security and the cloud.