Well, i have make some try outs, and finally, i was looking on how the Identity Manager, communicate changes to the provisioning server, so....
The solution for this, was to split the
SMPT:yyyy @ yyyyyyyy.yyy
into this:
{"address":"yyyyy @ yyyyyyyy.yyy","type":"SMTP"}
This is the way to pass into the Active Directory ProxyAddresses attribute, some values, so, with these i actually write in some Active Directory account, the special value to be added into the eTADSproxyAddresses attribute.
Let me fix, the part of my PX policy, to clear the old values, and put these new values into. i will be uploading this solution, and i hope that if someone has the same problem, this will help you a lot!!
Note: Ommit the spaces in the email addresses, I have to put as it, because of my content was blocked.