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.”

Login via web browser

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.

Explanatory screenshot to previous description
Login dialog in Firefox

Weblogin via Microsoft Edge (Windows)


Signing in within Microsoft Office

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

 
Explanatory screenshot to previous description
Logging in via Microsoft Office to access a document in SharePoint