After the migration of your mailbox to the new email system, you can access Outlook Web via - outlook.office.com
Before the migration, it was accessible via - exchange.hs-regensburg.de/owa
1
Open the website outlook.office.com and enter your username in the format abc12345@hs-regensburg.de
If something doesn't work, please try the same in an Incognito tab (Private window)
2
Kennwort eingeben
3
If you have set up multi-factor authentication, please complete the authentication process
If not, then you're all set!