Step 8. Create a map between your Windows user dave and your PCNFS user dave and the a map between your Windows Group sfu and your PCNFS group sfu.  

- From the  Service for Unix administration choose the user name mapping

-Choose maps and check simple maps 

- Click on Show Group Maps

 - Click on list Windows groups and click on Unix groups. This should generate a list of groups one Windows, one Unix. Select the group you create earlier called sfu in both lists then press the add button.  A group mapping should appear at the bottom of the page under a section title Mapped groups:

- Click on Show User Maps

 This should bring up a username mapping window. Here you create a map between your Windows user (dave) and the local PCNFS user (dave). Click on list Windows Users and Click on list unix users. Highlight the 'dave' user in both the Windows and Unix lists.  Then click add. This will create a mapping between them.

Click Apply and this will apply your setting choices.