E-mail Recover

As a lot of people, I’ve lost a bunch of emails when the transition from to took place. Not a smart man, as I only used the web based free version of the email and I had never ever backed it up.

After using the Email Recovery Add-In, I actually got most of them back to my inbox, dated back from 2010, BUT, the ones that I really needed, from one specific contact, I could not manage to recover at all.

Is there a way I can try and do this? I’ve tried reaching for Microsoft to see if they had anything that could help me, maybe a copy on their servers like they had with the other emails, but with no success.

I have little to none computer knowledge, so any help would be welcome!

Thank you!