Addendum: In the past I vaguely remember when someone's nk2 file was lost because their profile was damaged I was able to use the Nirsoft Nk2edit to create a new Nk2 file and then create records in the Nk2 file by importing addresses from the sent items in the message store and then importing the Nk2 file into the new pst file. I tried that again and for some reason the latest version of Nk2edit can't open the Outlook 2024 message store so I'm kind of stuck.