Managing personal Outlook.com account settings, security, and privacy
These are phishing attempts. You can just delete them. However, if you do want to help stop them, then report them to both Microsoft and to the provider of the email address in the link. They have been known to use a number of email addresses (e.g. hotmail.com and gmail.com). Hover over the "Report The User", but DON'T click on it. Depending on the browser, either the link will appear at the bottom of the window or just under your cursor. It will show "mailto:..." with an email address. Note what the address is and forward the email to the abuse account for that provider (e.g. ******@gmail.com). Believe it or not, they will shutdown the email addresses. It might not stop them, but it will slow them down and prevent them from receiving confirmations from people that do click on the links.