Deleted work e-mail

At school, I received an Outlook E-mail address. This address was deactivated after I finished school, but many of my old devices still ask me to login to my old e-mail on an hourly basis. Furthermore, the old e-mails were never transferred to a new e-mail address. 

How can I let Microsoft know that this e-mail address is not existing any more and is there any way to transfer my old e-mails?