When Microsoft acquired Sybari Software in 2005, security pros wondered whether it would lead to the demise of Sybari and its flagship Antigen email security product. Microsoft, however, hasn't tinkered much with it because of strong interoperability with Microsoft Exchange. Antigen, which finished second in the messaging category, has been rebranded and wrapped into Microsoft's Forefront line of security products. The software uses a layered, multiple scan engine approach and is integrated with Microsoft Exchange, SharePoint and Live Communications Server. Antigen provides server-level antivirus, antispam and content-filtering features. The software protects Exchange 2000 Server, Exchange Server 2003, SharePoint Portal Server 2003 and Windows SharePoint Services 2.0.
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