Active Directory Provisionning

Hello Everyone, 

Thanks in advance for your answers.

I have a problem with the AD Provisionning (Target Synchronization).

I don't know how to create a kind of CheckBox on "Create User Account" Form via Manager Application (also via Web Portal), to specifiy  if the CheckBox is Checked then Write for example "Hello" into one AD Attribute (for example the attribute "Info")

Could you help me please ?