Ahh that makes sense.
If that’s the case, would the team consider changing the verbiage to something like this?
"If you have a client portal account with this email address, the login link has been sent to that email address.
Click the login link to login"
This would be a little clearer to the client and would still have anonymity to protect against bad actors.
Updated verbiage would be preferrable for the “Forgot Password” page as well if possible.