I got the login details wrong and it went to a page about a security code and requesting an email address it could be sent to in the case of me not being able to access my account.

I got the code and entered it.

Accessed account ok.

Did what I needed to do and signed out of account.

I then became concerned about the code and contacted microsoft support.

When I was asked to sign in to my email account I found I was already signed in, and I know I signed out, and that all my folders, emails and contacts had disappeared.

There was just an email saying "Welcome to your new outlook.com inbox.

What has happened to all my messages and contacts, and how can I get them back??????