Outlook 2007 Security Changes
Security in Outlook 2007 takes advantage of the status of antivirus software installed on a computer. This change represents a major departure from the way the Object Model Guard worked in the past. If Outlook is able to detect that antivirus software is running with an acceptable status, Outlook disables security warnings for the user. This allows external applications that previously had to resort to Extended MAPI or third-party libraries to avoid security prompts under the appropriate conditions. This new behavior helps keep Outlook secure without overwhelming the user with excessive warning messages.
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