Hi Claud
I had an existing domain with 2 x 2003 servers - the AD level is 2003.
I added a new 2012 server with a vm for ad and an vm for dirsynch.
The 2003 servers are standard 2003 with sp 2
The 2012 serves are standard 2012
Password synch feature enabled, downloaded the software at the beginning of July.
Using filtered synch to particular ous.
Diana