I have recently deployed a new SBS 2008 server including Exchange 2007.
Overall everything works well but I have a problem with distribution groups.
For instance the SBS setup (?) has created a distribution group "allusers" containing all the users for the SBS domain. The associated e-mail address shows (correctly) as firstname.lastname@example.org and email@example.com. But trying to send to the group (internally or from the outside world) results in an "user not found" error.
I have tried to created another distribution group from scratch with a different associated e-mail but I get the same error...
Any idea ?