Using a second Factor (Duo App, Desktop App, HW Token) The Connection to OWA and SSO is the Same. OWA is just used an example here. So if you have problems to sign in on your SSO you may also follow these steps. Use of the DUO Desktop Application To setup the Duo Desktop Application click here . OWA     You may open the link https://mail.tu-braunschweig.de and register with your TUBS ID and the attached password. After that the Duo Desktop App will open up in a small window, to confirm your login click  Approve. Make Sure the Data is correct before approving!   If Duo Push is already setup just click "Weitere Optionen" and select Duo Desktop App VPN If you want to connect to the VPN with help of your Duo Desktop App, you may connect via the VPN gateway "vpngate.tu-braunschweig.de/saml" to connect to the network of the TU Brunswig After you will choose the option Duo Desktop as second factor  and approve the correctness of your data by clicking "Approve". At last you will click "Annehmen" to automatically connect with the VPN. Done! Use of the HW-Tokens Users who have received a hardware token (Duo Token) don't need to do anything further to use the second factor. It has already been linked to the TUBS ID and can be used immediately for logging into OWA, SSO, and VPN (via vpngate.tu-braunschweig.de, see below). Users who want to use the Duo Mobile App can find instructions here for first-time setup. OWA Please open the link https://mail.tu-braunschweig.de  and log in normally with your TUBS ID and password. Next, another window will open where you enter the 6-digit PIN generated via the HW token. VPN To use two-factor authentication for VPN login, you must log in to a different VPN gateway than before. This means that in the field that currently displays "SSL VPN" or "vpngate.tu-bs.de" (or similar), you must enter vpngate.tu-braunschweig.de Then enter your TUBS ID in the fiel labeled "Benutzername" When prompted for your password, enter your password followed by a comma and then the generated PIN. Using the DUO App (on mobile device) OWA     Please open the link https://mail.tu-braunschweig.de  and log in as usual with your TUBS ID and password.   Next, you will see a notification that Duo has sent a push notification to the registered device.   Once you open the Duo Mobile App on your device you will have to enter the shown code and click verify. Done! Make Sure the shown Data is correct. VPN To use two-factor authentication for VPN login, you must log in to a different VPN gateway than before. This means that in the field that currently displays "SSL VPN" or "vpngate.tu-bs.de" (or similar), you must enter vpngate.tu-braunschweig.de Then enter your TUBS ID as usual.   When using the Duo app, you only need to enter your password. Then, a push notification is sent to the app, which you must confirm within the app