Oct 05, 2018 In Mac Outlook, your emails and other mailbox stuff are stored to an OLM file. Windows Outlook does not read or identifies OLM file format. To export all the data from an OLM file of Mac Outlook to Windows Outlook, you need to convert it into PST format. There is a manual solution which can help you import OLM files data into Windows Outlook.
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If you want to have all your Outlook contacts available in your Apple's Mail application on your Mac, you'll need to get them all into the Contacts app. This entails a two-phase process. In the case of your Outlook address book, you'll have to save your contacts to a comma-separated value (CSV) plain-text spreadsheet—a format that's readily understood across both apps. Then, the application, which Mail uses for contacts management, can import the file and organize its contents with nary a hiccup.