How to change the default login account on a NAS Share
Login mounts are stored as startup items, so you need to do the following:


Open System Preferences 
Select Users &amp; Groups 
click on the "Login Items" tab 
find your NAS login in the list, select it and
delete it with the '-' button 
If your NAS admin SW has a method for setting an automount, use that, and ignore the following
Mount your NAS volume
In the Finder select the mounted volume (or a folder on that volume)
Drag the volume icon into the Login Items list (in system preferences)
Log out &amp; log back in to test