My company is in the process of migrating our internal Exchange 2003 mail to a hosted Office 365 service. As part of this project, we have a number of mailboxes that are still on our internal server which will not be migrated, so we want to archive them. Normally I do this using ExMerge, but it has a 2GB file size limit when exporting to a PST file, and some of the mailboxes are larger than this. I know I could use Outlook to archive the entire mailbox, but I would rather not do that if I can avoid it.
Are there any tools that you can recommend which perform the same function as ExMerge, but can handle any size mailbox?