We use Exchange 2010 and several distribution groups were created before I began working here. Many are the typical "Mail Non_Universal Group" and I just go to PROPERTIES and there is a MEMBERS tab, adding and removing users is very easy. BUT...We have some that are "Dynamic Distribution Group" If you go to PROPERTIES I do not see a MEMBERS tab. I do not see a corresponding group in Active Directory either. We have disabled a few users that are in a specific Distribution Group and I need to get them out because when we send to that group we get bounce backs. How the heck can I modify a Dynamic Distribution Group?