According to Network World (which got its data from a VMWare customer survey), half of VMWare’s customer base is using the product to virtualize Microsoft Exchange.
Why in the world didn’t these customers buy a SaaS mail product? For all the hassle of managing Exchange servers in your own data center, it’s just not worth it. The savings could have been tremendous and a lot could’ve been offloaded. Anyone who has used a product like Google’s G-Mail knows the spam filtering is 10x better than what anyone can afford with individual Exchange servers too.
Come to that, why isn’t Microsoft migrating Exchange customers into its own Cloud as fast as it can?