I think I've finally caught up on sleep... After upgrading from Exchange 5.5 to Exchange 2000 (successfully, but with little sleep) in 2 days without playing around with the software at all first, and then 2 tests and a bunch of homework during the week, I came home last night and slept for a good 15 hours. Much better now. BTW, if you're planning on upgrading from Exchange 5.5 to Exchange 2000, beware that depending on the migration method some extra mailbox permissions may be lost, and that MS reworked the way permissions are applied now (the integration with active directory means permissions to additional boxes are applied based on user rather than based on primary box). And now k5 is slow, so can't catch up there very easily...