I want to upgrade the design for a user who have about 80 folders created by himself.
I've already upgraded mailbox's design but in those case the user had not more than 5-10 self created folder. I did it following way:
1. I upgrade the design from the mailbox
2. Create the same amount of folders the user had created
3. Copy the mails from the old (user created) folder to the folder I created
4. Delete the old (user created) folders
5. Rename the new folders (give the new folders the name the old one had)
I can follow this procedure with 5-10 folders but not with 80 folders.
Do you have a better solution?