IBM's Ban on Dropbox and iCloud Highlights Cloud Security Issues
IBM has forbidden its employees from using cloud-based services such as Siri, Dropbox and iCloud, according to reports. These products (along with many others) are presenting a challenge to IT administrators who want to keep their organizations secure, as well as to consumer-software developers who suddenly need to build features with both consumers and businesses in mind.
My company deals with financial services. We are not allowed to access Dropbox either. Nothing like sharing personal identifiable client data across someone else's network. This is a violation of all sorts of laws, so yeah, it makes sense to deny employees access to shared drives outside the company's purview.