Go to Contacts folder
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Go to File->Import and Export
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Choose Import from another program or file
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Choose file format, CSV, from the list given, your file should be match this
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Browse the file.
Select your Options
Click on Next button
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Choose Contacts folder
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Go to MAP field from your file to outlook if needed.
OR
Click on Finish
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Drag the field from left side( these fields are from your file) and point to correct field on right side(these field are standard outlook fields)
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Click on Finish
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