As an admin you sometimes have to save diskspace on server, and after asking your Notes users politely to delete some mail, you are still stuck with the same amount of disk space occupied by their mail folders. How come? Lotus Notes grows its NSF files on a need-to-basis, but never shrink them again. To do that, you need to issue a command from the Lotus Notes server window (the black and white one):

load compact mail\xyzzy.nsf -B

where xyzzy.nsf is the name of the NSF file you need to compact. The -B switch compacts the database in place, recovers unused space and reduces the file size. -b (non-capital) does the same, except it does not reduce size of the file afterwards.

To move/replace/remove a mailbox is easy under Lotus Notes: Locate the *.nsf file you want to operate on. If, for instance you want to replace it with a restored backup, mark the file, go to the Notes Domino Console and type restart server. You can now – if you are quick and have prepared everything – do your things before the server comes back online.