Hi Alessandro,
Thanks for your response.
I also tried this way as you suggested. The issue that I face is that I have added the BO as a new tab on the lead. When I edit any values on the custom fields and save, it triggers Before Save event of the BO only and the Before Save event of the Lead doesn't trigger. So the change of values is not recorded on the hidden fields. Also when I try to access and change the Lead values from the BO event, I see the hidden fields as read only which cannot be edited.
Though I have solved this issue now by creating an Embedded Component for the extended BO fields instead of the BO fields and it looks to be working fine, but I would really like to know if in case there is such a requirement where one has to use BO fields only then how do we add those fields to the standard web service.
Regards,
Sumeet