New-DynamicDistributionGroup \ 
  -DisplayName "My Dynamic DistributionGroup"\ 
  -Name "My Dynamic DistributionGroup"\ 
  -OrganizationalUnit "OU=DistributionGroups,OU=Mailing,DC=contoso,DC=com"\ 
  -Alias "MyDistGroup" -RecipientContainer "OU=Users,OU=Marketing,DC=contoso,DC=com"\ 
  -RecipientFilter {MemberOfGroup -eq "CN=Some Other Group,OU=Groups,OU=Marketing,DC=contoso,DC=com"}