If you receive Activation Error Code 0xC004F065 on your Enterprise connected computer, then it means Windows has entered into valid non-genuine. The full error messages go as:

The Software Protection Service reported that the application is running within the valid non-genuine period.

Applicable for MAK and KMS client, the copy of Windows was determined as non-genuine. This can happen for many reasons including entry of a key which was later used somewhere else.

To fix this, you will need to obtain and install a genuine product key, and activate the system during the grace period. Otherwise, the system will go into the Notifications state at the end of the grace period.