When Microsoft bought Sybari earlier this year, you figured this was where they were headed. I certainly didn't expect them to give away enterprise antivrus solutions (even if the argument could be made they maybe they should give away antivirus software to protect their operating systems). Today, Microsoft finished its acquisition of Sybari and basically announced that it will be selling Sybari's Antigen antivirus products. Antigen is my favorite antivirus solution for Exchange. It always protected me well when I was running Exchange in my last job. I hope Microsoft keeps making the product better because it's a nice piece of software.