If you’re occupied with a workbook to which others also need to contribute, you can easily share your workbook in Excel 2013. On the Review tab, in the Changes group, you can choose to share your workbook by using either the Share Workbook or Protect And Share Workbook tools.
Moreover, you can use tools on the Share tab of the Backstage view to present your workbook online by using Microsoft Lync so that others can view and respond to your worksheet in real time. Be sure to sign in to Lync before choosing the Present Online option so that you don’t have to stop and sign in before sharing your workbook.
Click the Review tab.
Click Share Workbook.
The Share Workbook dialog box opens.