Image credit: YouTube

In an amusing viral marketing video, Microsoft has gone on the offensive, attacking Google Docs, the search giant's collaborative, online word processing tools.

The video offensive is an effort to promote its own Office 365 service.

In the video, Googen Apperson, a Google Docs salesman, tries to convince an executive to use the software in her organization.

But she points out alleged flaws in the Docs service, including how it doesn't work when you don't have an Internet connection. She is interrupted when an R&B singer breaks into song about how Google killed off a number of services.

"Google killed of Gears and Wave, they buried Buzz the same way. If Google Apps meets its grave, your business is hosed," he sings.

Microsoft calls it Googlighting and explains in its accompanying blog post that it is "what happens when the world's largest advertising business tries to sell productivity software on the side."

"If these concerns and current revelations about Google's privacy policies have you troubled, this may be a great time to check out Office 365, the online collaboration solution for businesses who don't want their documents and mail read," the blog states states.

Just this week Microsoft has also called out Google for circumventing privacy policies. Google did not immediately respond to ABC News' request for comment on the new video, which you can watch below.