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We have to migrate a lot of mail from an imap server to an exchange server.
The sizes of the boxes in the exchange server are limited to 2GB while a lot of our imap boxes are much bigger than that. We deal with this by archiving all mail older than 1 year and keep it as a local archive available.
However some users receive so much attachments that they fill 2GB in 2 months, for them we want to archive all mail older than 1 year or with attechments bigger then for instance 2MB.
It is easy to make a search and find all mail which complies to these criteria, however we want to preserve the (very large) folder structure.
Anyone a idea how this could be done?