Our company has about 40 offices, each set up as OU's in AD. I am setting up auto signatures in Exchange 2010, and assigning specific sigs to offices based on the distribution group they are members of. I realize I can select all users in a specific OU and make them members of the DG that corresponds with the sig they need, but it becomes an ongoing task anytime a user is created. My question is whether or not I can automatically assign a user of a specific OU as a member of a DG? So add user to OU "x" and they are automatically a member of DG "y".