When I first set up Outlook 2003, I put my contacts in folders and subfolders (health, stores, business contacts, utilities, friends, etc.) At some point, that structure failed, and all contacts were at the same level under Contacts. When I switched to Outlook 2016, several of those folders disappeared. I still have the original .PST file, though. How do I recover the missing contacts? Can I move the original folders into my new Outlook? Might this problem relate to my having changed my account from POP3 in O2003 to iMap now? Also: I now have a "Contacts" folder and another marked "Contacts (this computer only." Why both? Do I need both? Which addresses should go in each?