I have a large number of Distribution Groups on my Exchange 2007 server. I am starting to get spam addressed to these group addresses and would like to enable the "Require all senders are authenticated" option on all groups.
I know I can tick the option manually in each groups policy but that's unfeasible considering the number of groups, 100+.
Does anyone know a way to set this on multiple groups? (Shift+selecting multiple groups doesn't allow properties)