creating an address book entries based on sent or inbox email box

We copied over our email to office 365 however in doing so we lost our contact lists.

I want to recreate these.
Conceptually I was imagining going over the inbox (or sent box) and creating a list of contacts (names and emails) and then populating the address book.

Can anyone direct me to some code that can do this or get me close?

as you can imagine it is a bit annoying for the users (and a bit of a screw up) - so I am not concerned if this ends up taking a fair bit of time.

Before anyone runs off and does to much work I tried chat GPT and it gave me some code I could work with

the fixed up version is below.

I think this is ok although feel free to comment

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Untested here :

https://stackoverflow.com/questions/...ed-in-a-column

Another method :

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https://www.slipstick.com/developer/...from-messages/