I also missed this document. But it looks like (from the releasenotes) the 6.3 Release starts the integration with configuring the IVE via NSM.
It's there now. Ben called it. Two changes, the NSM one and this one:
Enhanced User Experience for Windows File Access Single Sign-On
To prevent potential user account lock out with using system credentials due to number of retries while using Windows File Access through the SA device, administrators now have the flexibility to choose whether to prompt the end users for credentials or to use the credentials that were used to login to the SA device when accessing Windows Files through the Core Access method.
Here is a link to the whats new
It is available now.