With the possibility of a Yahoo acquisition still uncertain, Microsoft is pouring hundreds of millions of additional investment dollars into its Online Services Business (OSB) in an aggressive effort to compete with Google in online advertising.

On a conference call Thursday to report its fiscal 2008 earnings, Microsoft Chief Financial Officer Chris Liddell said the company is investing the money in its online properties to drive advertising revenue and improve the performance and reach of its search engine and advertising network.

Microsoft's OSB is its weakest-performing division next to its Entertainment and Devices Division which -- despite the popularity of the Xbox product -- like OSB does not operate profitably.

Microsoft posted more than US$60 billion in revenue for fiscal 2008, and even OSB showed a revenue gain of 32 percent, from $2.44 billion in 2007 to $3.21 billion in fiscal 2008.

For the year, however, OSB lost $1.23 billion in operating income; a nearly 100 percent increase over the $617 million loss in operating income in fiscal 2007.

Liddell noted that Microsoft understands the weight of investing heavily in OSB if the company doesn't reap return on that investment, especially in light of the segment's lackluster results over the years.

"We do not make these investments lightly, as the loss in this division will be a drag on an otherwise exceptionally good performance," he said.

Liddell acknowledged that had Microsoft managed to seal the deal with Yahoo during the 2008 fiscal year, which ended June 30, it would have "accelerated" Microsoft's goals for improving OSB's performance and its search business in particular, and perhaps the investments would not have been necessary.

However, when it became clear the deal would not happen in the short term, Microsoft "made some decisions to accelerate our online services' organic growth strategy," he said.

Specifically, the investments will be made in several areas of the online business, with two-thirds of the money going into Microsoft's search assets, Liddell said.

One area of focus on search will be to drive usage of its search engine, as well as "business-model innovation, specifically in the area of high-value commercial search," Liddell said.

He cited Microsoft's Cashback program as an example of the latter. Launched in May, Cashback is comparative shopping feature in Microsoft's Live Search that offers consumers rebates on purchases of products found through the search engine. It's aimed at luring consumers away from Google and Yahoo.

The IDG News Service is a Network World affiliate.