Warning: Passwords are case sensitive and cannot be reset by the DMAT IT Services team or Microsoft. 

To password protect your excel document simply do the following:

1. Open the file

2. Click "File in the top left"

3. Click "Info" on the left menu (Usually at the top).

4. Click "Protect workbook".

5. Click "Encrypt with password".

6. Type the password into the box.

7. Type the password again to confirm.

8. Save the document.

Your document is now password protected.