To configure reCAPTCHA, perform the following steps:
Click Devices > Identity Server > Servers > Edit > Local > Classes > Name/Password – Form OR Secure Name/Password – Form > Properties.
Select Enable reCAPTCHA.
Specify the value that you noted down when setting up your reCAPTCHA account for the following fields:
Site Key
Secret Key
For more information, see Setting Up a reCAPTCHA Account.
Click OK.
Update Identity server.