In my opinion, the advantages for moving corporate e-mail to the cloud are as follows:

1) First advantage is increased productivity from flexibility or mobile accessibility. Regardless of where employees are, enterprise communications functionality can be delivered in real time. The business efficiency raises productivity because employees are able to make contributions to their work anytime, anywhere. Collaboration is increased as a lot less time are wasted. The further benefit from this advantage is that this help build up client relationship with increased client intimacy since it is appeared to them as the communication is made from the professional office.

http://www.communigate.com/Papers/NB47_Communigate.pdf

http://www.slideshare.net/XOCommunications/cloud-communications-top5-advantages

2) Reduced cost on software updates is another advantage. No more previous troublesome downloading or installing for communication software. Could communication suppliers are responsible to do all of the updates. So, work efficiency increased because people are only focusing on main competencies to the business.

http://www.telepresence24.com/?p=1913

3) Cost savings. The reason capital expense will decrease is that cost associated with network and equipment for cloud communication are mainly operating cost rather than management activities or other sophisticated internal IT requirements. No initial capital investment required to set up the infrastructure or in-house expert.

The risks associated as a consequence are as follows:

1) The first concern comes to me is date security issue. Since the email system is not in our own control, what happens if the system fails in protecting the private information?

2) Service reliability risk can be caused by either loosing internet connect or the provider fails to deliver the service, like system