Hi Russell,
I am not sure if you were able to find what you were looking for already. But regarding your question for my test system, I got it setup with two key thing.
1) Set up the AWA ldap so that it work with for both of your domain
2) For the Ldapsync - What I ended up doing was having two set of the LDAPSYNC binary files/folder...
- ldapsync binary set A - The configuration just to point to the LDAP domain A...
- ldapsync binary set B - The configuration just to point to the LDAP domain B
I find this the easiest way, as I keep two different configuration files/binary for the different domain and can configure them desperately.. As within the AWA you just need to set up another job to run the new binary file every X often and it will go out and check for any user in the new ldap that match your new setting...
So on the system you might see user object such as examplename/DomainA or examplename/DomainB (image those domainA & B as your actually company AD domain).
Edit:
If anyone else on the community is running multiple AD domain with LDAPSYNC - Mind chiming on this topic if you are doing anything differently or want to expand onto anything I have mentioned?