To import contacts from a CSV file or from Excel into Outlook:

1. Select File, Import and Export from the menu in Outlook.

2. Make sure Import from another program or file is highlighted. Click Next.

3. Now make sure Comma Separated Values (Windows) is selected. Click Next.

4. Use the Browse button the select the desired file.

5. Choose Do not import duplicate items. Click Next.

6. Select the Outlook folder you want to import the contacts to. This will usually be your Contacts folder. Click Next.

7. Click Map Custom Fields.

8. Make sure all columns from the CSV file are mapped to the desired Outlook address book fields. Add a Birthday Field to import Birthdays.

9. You can create new mappings by dragging the column title to the desired field. (i.e. The Birthday column)

10. Any previous mapping of the same column will be replaced with the new.
Click OK.

11. Now click Finish.

Hope this helps.