Setup SMS
- Login to Dynamics 365 F&O
- Select Self services module
- Select Setup
- Select Application parameters
- Go to SMS
- Select SMS setup section
- Select SMS provider
- Define User ID
- Define Password
- Define SMS API key
- Enable SMS
- Define sender name according to approved name with SMS provider
- Enable OTP authentication
- Update OTP expire field by 00:00:30
- You can test the SMS integration setup by adding any mobile and check the recived message for sucsess .

