The information technology industry is characterised by more change than any other in modern times. The most recent and dramatic impact is the paradigm shift from on-premise technology services models to that of cloud computing. The messaging and communications arena is one of the first to be considered for cloud-based, on-demand models, but few organisations in the world are able to adopt a cloud model for its messaging and communications technologies. This document looks at the various considerations for messaging in the cloud and the immediate requirements that need to be considered if you have a future vision for messaging in the cloud.