What are the problems faced when migrating multiple IT services to the cloud?  Inconsistent service attributes: Service attributes include security, reliability, availability, scalability, quality of service (QoS), support, and service level agreements (SLAs).  They determine how well a service will perform and how much time and energy will be required. Crosstalk: This can happen when multiple services compete for the same resource, such as bandwidth or network router processing power. Cloud services money pit: Each cloud service provider must charge a minimum monthly fee to cover its infrastructure costs which becomes excessive as the number of services and the number of providers increases. User friction frown: While single sign-on can alleviate a small portion of the redundant task "friction" caused by multiple IT services, keep in mind how much aggravation your users may experience. However moving to cloud computing can lower capital expenses, lower onsite management and upgrade costs, global service consistency, virtually unlimited scalability, and better support for remote and mobile workforces. Read more at :

http://www.informationweek.in/informationweek/news-analysis/297554/headaches-multiple-cloud-services