Also, Word 2010 doesn't have any 'Tool option', but the use of term indicates that the customer was probably reading instructions for Word 2003 or earlier.
The key is that business cards are handled as labels. In Word 2010, click the Mailings tab of the ribbon and then click the Labels button near the left end. Click the Options button in the Labels dialog. Open the 'Label vendors' list box and choose Avery US Letter. In the 'Product number' list, choose any of the Clean Edge Business Card items from #8869 through #8878 -- they're all the same layout.
Simply filling in the text in the Address box of the Labels dialog is sufficient for all-text cards. If the customer wants to include graphics, he or she should read this page: http://www.gmayor.com/graphics_on_labels.htm
The Avery step-by-step wizard for formatting and printing Avery labels, business cards, and more is now retired.
You can still use Word to create and print Avery based labels and cards from Word templates, label options, or templates you download from the Avery website.
Word templates
To find a variety of Avery-compatible templates in Word, go to File > New, and type Avery in the Search box. Templates for Avery-compatible return address labels, CD labels, gift tags, name badges, and more will appear.
Label options
To format Avery-compatible labels, go to Mailings > Labels. Select Options, and choose Avery US Letter (or Avery A4/A5 for A4/A5-size paper) in the Label vendors box. Choose from the list of products.
For details about making labels in Word, see Create and print labels.
Downloads
Avery Templates For Microsoft Word
On the Avery website you can find templates at avery.com/templates that you can use Word to download.