hi,
we used to set quotas, too. in some weeks users who don't like to cleanup their old mails or really need them have to fill out a form (concerning security, classification etc), let it sign and contact the helpdesk.
then admins extract everything older than the specified date (replicate) and remove that stuff from the original mailfile. finaly the user receives a CD with his "archived" mailfile including an index for fulltext-search. he can use this locally or it can be put on a different file-/cd-/notes-server.
some hints before creating the cd:
when replicating the mailfile, set a "cd publication date"
then open the replicated mailfile and
- use and update every view (!)
- create or update the fulltext-index
usings notes since 1994 (2 years as admin), I learned that very often mountains of data are stored as dupes in different mailfiles of users working together everyday; i was one of them. then it's time to think about send-in databases, document archives or shared directories on a fileserver etc.
when they argue that they might have to proove that they had sent a mail to somebody someday, that's a different problem ;-)
hope it helps,
chris