This policy setting controls whether e-mail messages dragged from Outlook to the file system are saved in Unicode or ANSI ...

This policy setting controls whether e-mail messages dragged from Outlook to the file system are saved in Unicode or ANSI format. 

If you enable this policy setting, when users drag an e-mail message from Outlook to the file system, Outlook uses the Unicode character encoding standard to create the message file, which preserves special characters in the message. 

If you disable or do not configure this policy setting, when users drag an e-mail message from Outlook to the file system, the message file created is in ANSI format.