2.2.3.6 endorseUser Response Document Format for Focus INVITE Responses
In addition to the syntax rules specified in section 2.2.1 for C3P responses, the following additional rules apply.
conferenceKeys: This element MUST have the same values as those specified in the corresponding endorseUser request.
result: This attribute MUST contain one of the following values:
success: The endorseUser request was completed successfully.
otherFailure: An error prevented the endorseUser request from completing successfully.