We have a new install of Exchange 2007 and all users are using Outlook 2003. The users are able to edit the DL from Outlook so when the next person uses that DL they have an edited list. How do I make the DL read only? I dont care if they use the DL to populate the Send To field and modify that. But I have to prevent them from double clicking on the DL and being able to edit it. I am fairly new to Exchange 2007. Is there something simple I am missing? Thanks

GoneFishing2, Take a look at the link below. http://knicksmith.blogspot.com/2007/04/delegating-distribution-group.html

check the permission in the security tab of the DL

Checking permission on the DL was like chasing a needle in haystack. There was on obvious granting of write permission. I resolved it by adding a group to the DL and then checking Deny to Write and it worked. Thanks for your help. It got me pointed in the right direction.