I am writing a custom policy for reset password on Azure B2C. When the user tries to reset password on an account that doesn't exist, this message shows up: 'A user with the specified credential could not be found' error message'.

As per the documentation here:

CodePudding user response：

You can try like this

String ID

UserMessageIfClaimsPrincipalDoesNotExist: We can't seem to find your account.

forgotpassword_link : forgot password

For more string ID's Please refer this