I receive the following message: "The Outlook web address https://xmail.mwn.de/owa is out of date." Why is that?

The error message "Die Outlook-Web-App-Adresse xmail.mwn.de/owa ist veraltet" indicates that no Exchange mailbox exists for you and that the e-mails are either being forwarded or read by the MyTUM mailer.

If you want to receive your e-mails via Exchange, go to TUMonline, click the "E-mail Addresses"link, and

change the delivery method to "TUM Mailbox (Exchange)".