Antigen found VIRUS= Exploit.IFrame.FileDownload (Kaspersky) virus

Antigen for Exchange found Unknown infected with VIRUS= Exploit.IFrame.FileDownload (Kaspersky) virus.
The file is currently Removed. The message, "PageName ", was
sent from list and was discovered in SMTP MessagesInbound And Outbound
located at University of Northern Colorado/MainCampus/ITEX01.