Note on the primary email address:
These usually take the form “firstname.lastname@[mailbox.]tu-dresden.de.”
You can find your primary email address in your profile on the Self-Service Portal under “E-mail” as your “Primary email address.”
After calling up the SharePoint website, a login dialog opens to request the login data. This dialog does not appear on the web page itself, but is displayed by the web browser used. For a successful login you need as
Weblogin via Firefox, Chrome etc.
Weblogin via Microsoft Edge (Windows)
If you want to open a document from SharePoint in Microsoft Office, you must also log in to the Office program. For a successful login you need as