We do have a case where we would like to setup an Exchange distribution group (created using New-DistributionGroup with closed joining and leaving) in order to easily reach multiple teams. Adding users directly works just fine but using the security groups of those teams doesn't seem to work. The security groups are not mail enabled but each individual user object within the security group has a mailbox.
Would anyone happen to know if there is a way to make this work? It looks like distribution groups only check their direct members? Could it be because the distribution group is a universal group while the security groups are just global? I do know the revers doesn't work.