> just like to ask one more question. Does it matter if you put the > contacts in a Global>>Distribution Group or a Domain Local > Distribution I don't think so. Many of mine are currently Universal groups because the Exchange 5.5 to 2000 upgrade process creates them in that manner. > this scenario. Also is there any other advantage of using > security groups > in this way other than the fact that you can apply them to You can only put user accounts into security groups and you can put only mail-enabled directory objects into distribution groups. They really aren't interchangeable.