New user notification emails

Hello there,

After updating to the WP 4.6, just a few days ago, we are unable to disable the new user notification emails from being sent.

We did have this properly disabled, prior to the update, although I'm not sure of the exact method used.

We've tried the popular WP plugins - at least 3 of them - to no avail.

Hoping to find a solution to this, as our welcome emails are already sent by our CRM.