I'm trying to migrate all mails and folder from a IMAP email to a another. I selected all the folders and drag them to the new mailbox.
I can see some of the folder but not all the sub-folder, also when I check mailbox detail, the count is not the same.
the issue is I start moving some new mail to the new mailbox only.
How can I get the two mailbox completely synced ?
PS one is from iCloud, the another is from a exchange server.