Set up Nexus OTP as 2FA for Outlook Web Access

Network schematic with Nexus TruID Synchronized as an example.

1. The end user starts the TruID client and enters the PIN in TruID to generate an OTP.
2. Outlook Web Access request the end user to enter username, password and OTP.
3. The end user enters username, domain password and OTP.
4. The domain credentials are validated by the Active Directory through Outlook Web Access.
5. The OTP authentication request is relayed to Digital Access Authentication Server via RADIUS by Microsoft ISA Server 2006.
6. The authentication server validates the OTP with the associated TruID token and PIN from the user database.
7. Upon successful validation, the authentication server responds with successful authentication to Microsoft ISA Server 2006.

Microsoft ISA Server 2006 and Outlook Web Access provides access to the end user.

• Deployed Digital Access, see Deploy Digital Access component
• Installed Microsoft ISA Server 2006, see https://technet.microsoft.com/en-us/library/bb898433.aspx

1. Log in to Digital Access Admin with an administrator account.

In step 3, enter the IP Address of the RADIUS Client (Microsoft ISA Server) and the Shared Secret Key.

1. In Digital Access Admin, go to Manage System.

2. Click RADIUS Configuration > Add RADIUS Client...

3. Enter General Settings and Attributes. Click the ?-sign for help.

4. Click Save.

Nexus TruID Synchronized is used as an example. Other Nexus OTP authentication methods are enabled in a similar way.

• In step 3, select Nexus Synchronized as method.
• When the default RADIUS replies are shown, click Next. You can also add your custom RADIUS replies or modify the default replies if required.

To add a new authentication method:

1. In Digital Access Admin, go to Manage System.
   
2. Click Authentication Methods.

3. Click Add authentication method..., select the desired method and click Next.

4. Enter Display Name, a unique name used in the system to identify the authentication method.
5. Select if the method shall be enabled and if it shall be visible in authentication menu.
   
6. Register Authentication Methods Server when applicable.
   
7. Make other configurations as needed for the selected authentication method. For more information , click the ?-sign. Click Next.
8. If needed, make settings in RADIUS Replies and Extended Properties.
9. Click Next and Finish.
10. Click Publish.
    

1. Log in to the Microsoft ISA Server 2006 server and open the administration console.
2. Check Collect additional delegation credentials in the form.
3. Select RADIUS OTP.

4. Click Configure Validation Servers.
   
   

   

5. Click Add in the RADIUS Servers tab.
   

   

6. Configure the RADIUS server’s details (Server name, Shared secret, Authentication port, Time-out) in the Add RADIUS Server pop up. Click OK to apply the changes.
   

   

7. In the Users tab, select the user groups that this rule should apply to. In this example, the All Users group was selected.
   

   

8. Click Next.

1. Start Nexus TruID that is installed on your laptop or smartphone - Enter your PIN to generate an OTP.
   
   

   

   

2. Start the web browser and browse to Outlook Web Access.

3. Enter logon credentials in the Outlook Web Access logon page:

   1. AD UserID in the User Name field.

   2. The OTP from TruID Synchronzed in the Passcode field.

   3. AD Password in the Password field.
      

      

4. Click Log On.