Hi Oferf,
though it is not supported, but if you are working in an on premise environment and only single organization is there.then you can acheive this functionality by modifying the CRM Server files.
Before modifying OOB file make sure it would not affect any other org.
If you are ready to make these changes then let me know, I'll provide you with the code.
I did it, it works.
Thanks
Kuldeep