Update properties on Domain Admin accounts

Hi

Is there any way besides making the FIM action account member of Domain Admins to have it update properties on Domain Admin accounts?
I would like to use FIM to synchronize information like name and phone numbers from the user regular  accounts to their admin accounts. But as they are Domain Admins I always get access denied.

I tried to specifically add write permission on some of the attributes to FIM on one of the DA's and then FIM could update the info, but after a while the permission was gone again?

Thanks

Peter