How To Open Msg Files On Mac Outlook. @r_joy91 you need to use a msg viewer app (not aware of any for mac) or convert the messages to eml files. After upgrading to windows 10, when trying to open a file, outlook is not shown as an option for opening file type.
An administrator password is required. An msg file is an outlook mail message file.
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And doing a quick repair. And now when you right click on the msg file outlook is shown as an option.