If you connect with a provider like Gmail in the article .. your email is still on google’s servers.. modified messages don’t get synchronized back. You can ch

If you connect with a provider like Gmail in the article .. your email is still on google’s servers.. modified messages don’t get synchronized back. You can choose to leave your mail on the server with all mail providers. The only difference is that now Microsoft keeps a second copy of all your mails so they can do more AI on your data