Well, my current strategy is to migrate users when we give them new PCs this summer, then only tell them about the change later. Much later. Initially they'll b

Well, my current strategy is to migrate users when we give them new PCs this summer, then only tell them about the change later. Much later. Initially they'll be using Outlook to access email; they can use the web interface later if they want to. Why would they be interested in which email backend we're using? The trouble with asking them, or informing them in a way which suggest I want their opinion, is that it very quickly just becomes a beauty contest, where I have sound technical and financial reasons to make the move.