Oui, j'ai besoin d'une solution
Archive Explorer options Save As, Reply, Reply to All and Forward are all greyed out on multiple clients. We've fixed this one at a time by changing Settings, "Microsoft Outlook" to "Web browser" and back. But this manual fix will not be practical for the whole organisation; I've checked 5 users on 5 computers and they all have the issue.
EV 10.0.4 on Exchange 2007 with Outlook 2003 & 2010.