Low confidence in data security, the fact that corporate data can be critical or not but it is private, not located within the walls of the company is something that is not generally liked and especially to senior management in some occasions it is conservative and skeptical.
It remains an arduous task to convince and exposure of the idea by the IT manager the rest of the policy. Typically, it begins to introduce the idea of software as a service to applications that manage critical data (human resources, billing, law, etc.) and quantify the benefits of SAAS through a control panel.