File Share Connector users not mapping

Hi everyone,

In need of some help here. I've setup an on-prem file share connector following this guide:

https://learn.microsoft.com/en-us/microsoft-365/copilot/connectors/fileshare-connector

I can see the indexed items in my test folder, but, we can't crawl that data because the users are not mapping for some reason. I've been testing using the NTFS file permissions option. Has anyone had any success with using this option to sync/map users to the connector? If so, what were the requirements?

The users are AD to entra id connect synced and the group I created is also AD to entra id connect synced as well. I applied ntfs perms to the test folder directly using the synced identity and tried using the group and the full crawl still does not populate users. I am not using nested groups neither. I also tried removing built-in groups such as administrators, authenticated users, etc. 

I've had a ticket open for weeks with Microsoft now with no answers.