I keep receiving other peoples emails on my live.co..uk email address, some of them have confidential information . It looks like there is a security problem on outlook.com or they have issued duplicate email addresses

Has anyone else seen this and is there a way to get this problem fixed.

i GOT AN E-MAIL FROM supposely hotmail team saying that if i don't update my account that my account will be deleted.It's from (removed PII) this legit???? cause they are asking for my info ,password and all the other info of my account.Please help????