To change your ECS settings, such as adding or changing your content server password, you must first be in the account to change. Next, press the Menu icon followed by the Settings item:
Next, select Account settings:
Select the last item in the list, Envelope-Content Splitting:
From the list of ECS settings, select Content server password. If you wish to display the password as you enter it, you may check the Show password box first.
Enter the password into the text field:
The other settings are handled similarly.
When you’re done, press the OK button, then the return icon twice to return to your message list.