OpenXchange's primary key is display name (= first name + last name). In absence of clear error message from dimail (yet), we catch errors 500 and check if they're not due to the display name already existing in the context
OpenXchange's primary key is display name (= first name + last name). In absence of clear error message from dimail (yet), we catch errors 500 and check if they're not due to the display name already existing in the context