Sharing a Data List To turn workbook sharing on
On the Tools menu, click Share Workbook.
Select the Allow changes by more than one user at the same time check box, and then click the Advanced tab.
Click OK to accept the default settings.
Click OK if a message box appears, and then save the workbook.
Sharing a Data List To send a workbook to colleagues by e-mail
From the Microsoft Windows Start menu, open Microsoft Outlook Express.
Click the New Mail button.
Click the Attach button.
Navigate to the target folder, and double-click the file to attach.
Managing Comments To add a comment
Click the cell to which to add the comment.
On the Insert menu, click Comment.
In the comment field, type the comment.