We're nearing our upgrade/migration from 2007 to 2013 and am at the stage where all users have moved off 2007. We wanted to unplug 2007 for a couple of weeks to see what would happen and within 24 hours noticed that email sent to a dynamic distribution group was not being sent, but not received. After a day of scratching our heads we plugged 2007 back in and a few minutes later the emails came booming in.
We did create a DDG on 2013 and notice it is not manageable from 2007 so there is something that gets upgraded.....just what though?
So my question is how do I upgrade the existing dynamic distribution groups from 2007 to 2013?