Cross forest sync distribution groups "no trust"

Hi all,

Running FIM 2010R2 Build: 4.1.3627.0 on Server 2008R2.

Mission: synchronize GAL and Distribution Groups between 2 forests. (no trust, Exchange 2010 SP3 - Exchange 2013)

Frankly new on FIM, but got after a lot of google, GAL sync running. Works great.

Next on the list is sync distribution groups, but can't seem to find much info.

Is this possible with FIM? Can someone please push me in the right direction?

Thanks