Click Setup/Admin > Users & Passwords.
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Select the check box if the user becomes inactive. Inactive users may not log in. Use this to inactivate an account that you may want to reactivate at a later date.
You may enter a password up to ten characters in length. You can use alphabetic or numeric characters, or a combination of both.
The default is No. To mark a user as a security administrator, select Yes.
Enter the user's phone number.
Select the check box if the user's phone number is unlisted.