If you have received an email containing a .xls file, you may open the .doc file in Office2 in the following way:
- From the Mail app, open the relevant email message.
- Tap on the attachment. A preview window will appear, showing the workbook file
- Press the Open In... button at the far right of the navigation bar.
- Select Office2 from the list of applications.
Once the workbook is open in Office2, you may begin editing it. You will not however be able to save the workbook to its current location. This is because the workbook will have been copied to an Inbox folder (which is created if it doesn't already exist) and this folder is read only. Instead, you must save the workbook to another filename.