The 'Change Password' tab is missing due to users set to use same setting.

Cause:


The 'All users of this PC use the same preferences and desktop settings' option is enabled in 'Control Panel', 'Passwords'. System policies set by the system administrator may have restricted access to this particular option.

Solution:


Select 'Control Panel', open 'Passwords', and select the 'Users can customize their preferences and desktop' radio button.
NOTE: Administrative rights may be required to solve the problem. Please contact your administrator or next-level support.