The blog calls the elimination of this package of integrated Microsoft back-office programs a move to "streamline [Microsoft's] server product portfolio."

"[M]idsize businesses are rapidly turning to technologies such as ... virtualization and cloud computing as a means to cut costs, improve efficiency, and increase competitiveness," the post stated. "Those capabilities are already available through other offerings, including Windows Server 2008 R2, Microsoft System Center and the Microsoft Business Productivity Online Suite."

Microsoft officials declined to comment further.

Windows Essential Business Server 2008 bundled versions of Windows Server, Microsoft System Center Essentials, Microsoft Exchange and other programs into one package priced to to small and medium-sized businesses with 300 computers or less.

The change affect the next version of Windows Small Business Server (), the company said.