You can update the email address of a user by specifying the unique ID
Here are the required parameters
admin : Pseudo of a forum administrator
adminpwd : password of a forum administrator
iduser : user id which email should be updated
newemail : new email address for the user
PHP script example
The webservice returns two parameters
iduser : recall the unique ID
status : "updated" if the email ahs been updated "already exist" if the email already exist in the forum members data basis . Two forum members cannot have the same email address.