Microsoft has announced that their advertising partnership with Yahoo and AOL is now fully operational.

The three companies have collaborated to share their advertising inventory to provide the best result for their customers.

This collaboration is largely aimed at taking on Google which dominates this market segment.

Microsoft said:

This milestone for the Microsoft Media Network is enabled by the advanced technology and capabilities of our Microsoft Advertising Exchange, which we launched in March of 2011. Over the past year, we have been extremely pleased with the Exchange’s performance and the way it’s helped our customers efficiently access and utilize our inventory to build powerful solutions. We’ve seen rapid growth of the Exchange, which is now available in 15 markets globally and continues to ramp.

I want to thank Yahoo! and AOL for their partnership on this agreement, which took a concerted effort from all parties. We are confident that the digital media ecosystem will benefit from the opportunity to access premium inventory, across all three partner networks, at a scale that has never been available before.