If the user is linked to a Raiser's Edge constituent record, the user can change their email address via a page containing a Profile Form part.

If the NetCommunity user record is linked to an Education Edge record, the user can change their email address via a page containing a Profile Form (EE) part. Additionally, you can update the user's email address in Education Edge and re-run the 'Add Users to NetCommunity' utility for that user and Education Edge will pass along this address change to NetCommunity (but you must select the correct email type in the options for the utility).