[389-users] Sync from multiple Active Directories and 389 Directory Server

I have an environment with multiple Active Directories Forests and several UNIX client machines

I have another LDAP Directory to authenticate UNIX users.

The problem with this implementation is that the users used and passwords used to authenticate in WIndows and Unix machines are different.

My idea is to use the Active Directories as main repositories for users and passwords.

I want to enable users of Active Directories to login in the UNIX client machines (Solaris, Linux and AIX) using their regular windows users and passwords.

I have a requirement to have the UIDs and GIDs of UNIX users consistent across all UNIX machines.

I am considering the use of 389 Directory Server to create a unique directory with the users from both Active Directories and configure all the Unix clients to use this directory.

I found several references to synchronisation between 389 Directory Server and Active Directory however i found no reference to a configuration with multiple Active Directories.

Is this possible ??

Does someone have some kind of suggestion to accomplish this goal ?

Thanks in advance 

Artur