What will happen to my local mail if I switch to IMAP for my email?

Episode 1256 (42:53)

Bob from Detroit, MI

Bob wants to switch from POP3 to IMAP. What will happen to his email when he does? Leo says that for complete safety, it would be a good idea to create a new email account for it. But chances are, just changing to the new settings won't do anything to it. Leo also says that Outlook supports archiving and he can archive it folder by folder with separate PST files for each folder. Then he can turn on IMAP with no risk. That's the wise thing to do. Always backup before making a major change.