In Outlook:

1. Click “Option” under the “File” tab.

2. Click “Open & Export in the left menu and then "Import/Export".

   

3. Select “Export to a file,” click Next.
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4. Within the Create a file type: select "Comma Separated Values" which is a CSV file, click Next.
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5. Under “Select folder to export from,” select the contact folder that you want to export, and then click Next.

6. Choose a location and name for your backup file and then select Finish.
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7. You can click here for importing instructions.