Policy
Use Unicode format when dragging e-mail message to file system
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 or do not configure 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 this policy setting, when users drag an e-mail message from Outlook to the file system, the message file created is in ANSI format.
e40ad26b7f93 L_MSGUnicodeformatwhendraggingtofilesystem Registry
Copy registry mappings
HKCU\software\policies\microsoft\office\16.0\outlook\options\general\msgformat (enabled) = 1
HKCU\software\policies\microsoft\office\16.0\outlook\options\general\msgformat (disabled) = 0 Policy notes
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 or do not configure 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 this policy setting, when users drag an e-mail message from Outlook to the file system, the message file created is in ANSI format.