You can find here:

• A web interface to read your Email:
  Roundcube WebMail
  Introduction and Tips
• A page to change your password:
  Change password
• A page to change your email absence message:
  Create · Remove
• A tool for setting spam filters:
  Set · Remove
• A page to configure email forwarding addresses:
  Add · Remove

You may get further IT informations in the Intranet on the topic EDV (German only).