Navigate to "Messaging\Services"

Click "Create Messaging Service"

Enter a name in the "Messaging Service friendly name" box

Click "Create Message Service"

Click "Add Senders"

Select "Phone Number" as the "Sender Type",

Click "Continue"

Check the phone number to be used as the Sender

Click "Add Phone Numbers"

Click "Step 3: Setup Integration"

Select "Send a webhook"

In both the Request URL and Callback URL boxes, enter

https://your-dualshield-fqdn:8074/sso/callback/twilio/sms

Replace "your-dualshield-fqdn" with the real FQDN of your DualShield server, e.g. https://mfa.deepnetid.com:8074/sso/callback/twilio/sms