Unfortunately, DL's don't sync to the BB. If the DL has an email alias address, you can enter that as a contact. For example, we have a DL named "US National Mobile Device Experts" which has the email address US
. I can create a contact with the LAST NAME "US National Mobile Device Experts" (sans quotes), and give it that email address, then I can send an email to all the people in that DL from by BB. It would be nice to be able to see who's in the group on the BB, but that shouldn't be a big issue anyway. If you send an email to multiple DL email addresses this way and there are duplicates among the DL's, Exchange SHOULD weed out duplicate end users and not send multiple copies of the emails.
I agree it would be nice to be able to use true DL's on the BB, and considering the latest versions of the firmware supports "groups", this is a real mystery!