You can copy a single contact entry or your entire address book from Microsoft Outlook Express to Yahoo! Address Book.

Copy a single entry from Outlook Express and put it in Yahoo! Address Book:

First, export the contact from Microsoft Outlook Express as a vCard (.vcf) file.

1. Open Microsoft Outlook Express.
2. Open the contact you want to add to your Yahoo! Address Book
3. Choose "Export to vCard file" in the File menu.
4. Save the file on your computer in a handy place that you'll remember.

Now, import the contact into Yahoo! Address Book

1. Open your Yahoo! Address Book and click "Import/Export" in the upper-right corner.
2. Under "Import", choose "vCard (.VCF file)" from the pull-down menu in Step 1.
3. Click "Browse" to find the vCard file you just saved on your computer.
4. Click the "Import Now" button to import the file.

Copy your entire Microsoft Outlook Express address book and put it in Yahoo! Address Book:

First, export information from Outlook Express:

1. Open Outlook Express.
2. Select "Export" from the "File" menu.
3. From the "Export" menu, select "Address Book."
4. Select the file type "Text File (Comma Separated Values)."
5. Click the "Export" button.
6. Enter a location where the file will be saved and a name for the file (file name should end in ".csv").
7. Click the "Next" button.
8. Check which fields you wish to export. (We recommended checking all boxes.)
9. Click "Finish" to export the data to the Comma Separated Values (.CSV) file at the location you specified.

Next, import this .CSV file into your Yahoo! Address Book:

1. Open your Yahoo! Address Book and click "Import/Export" in the upper-right corner.
2. In the Import section, select "Microsoft Outlook (.CSV file)."
3. Click "Browse" to find the file on your system.
4. Click the "Import Now" button.

Your Yahoo! Address Book can only import data that Outlook Express placed in the CSV file. Some of your data may be excluded if Outlook does not place it in the .CSV file. Also, make sure you have data in the "First," "Last," or "Company Name" fields before importing to Yahoo! Address Book, since at least one of those fields is required to create a Yahoo! contact.