To counter Microsoft's allegations of last month, Salesforce filed its own patent lawsuit against Microsoft.
"The Salesforce suit (PDF, 12 pages), filed in U.S. District Court in Delaware, cites five patents held by Salesforce.com, alleging they're violated by Microsoft products including Windows Server AppFabric, Windows 7, Windows Server 2008 R2, Microsoft SharePoint, ASP.Net Web Services, and Windows Live authentication system. The suit seeks triple monetary damages, citing Microsoft's "willful infringement."
"We're reviewing Salesforce.com's filing, which we've just received," said Horacio Gutierrez of Microsoft, in a statement. "We remain confident about our position and will continue to press ahead with complaint we initiated in the U.S. District Court for the Western District of Washington."