Deploy the August 11th updates to all applicable domain controllers (DCs) in the forest, including read-only domain controllers (RODCs). After deploying this update patched DCs will:
Begin enforcing secure RPC usage for all Windows-based device accounts, trust accounts and all DCs.
Log event IDs 5827 and 5828 in the System event log, if connections are denied.
Log event ID 5829 in the System event log whenever a vulnerable Netlogon secure channel connection is allowed. These events should be addressed before the DC enforcement mode is configured or before the enforcement phase starts on February 9, 2021.