Microsoft's acquisition appetite is not limited to its $33 per share offer for Yahoo, a report says.

The software giant dispatched investment bankers to gauge whether Facebook would entertain an offer, according to Dow Jones’ AllThingsD web site.

Microsoft owns 1.6 percent of the site after its $240 million investment in 2007 put a $15 billion on the social networking site.

The report said no negotiations are now underway between the two companies. Microsoft’s online-offline strategy of letting users tap key data like contacts wherever they are leans heavily on a social networking component.

Microsoft broke off negotiations with Yahoo over the weekend after its stock and cash offer was rejected. The software company initially bid $31 per share, or $44.6 billion, when it went public with the offer in February.