Removing the password
An admin can remove the password requirement for a user's account.
To remove the requirement that a user must log on with a password, clear the Password required check box on the Password tab in the user's properties.
You can access a user's properties, from the Tasks pane, or from the Resources pane.
From the Tasks pane, double-click Find a Resource and then specify the user to find. If you start from the Resources pane, right-click the Users icon in the OU in which you want to search, and then click Open.
Now, right-click the user name, and click Properties. Click the Password tab, and then clear the Password required check box.