Hello,
Here are a few things to consider:
1. Check SMB Protocol Compatibility:
Confirm that SMB2 or SMB3 is enabled and functioning correctly on both the server and all client systems.
2. Validate Share Accessibility:
Attempt to manually access the SYSVOL and NETLOGON shares from a client machine using the UNC paths (\servername\SYSVOL, \servername\NETLOGON). This step helps identify any basic access issues that might disrupt domain functionality.
SYSVOL contains crucial GPOs that must be distributed across all domain controllers for consistent policy application. Any disruption to SYSVOL access can lead to GPO application failures.
Verify that SYSVOL replication is occurring seamlessly among all your domain controllers. Utilize tools such as the dfsrdiag
command-line utility or the DFS Management console to inspect replication health.
3.Review Event Viewer Logs:
Inspect the Event Viewer for signs of trouble, focusing on the System and Application logs. Specifically, look out for error messages related to SMB, DFS Replication (Event ID 1006 may indicate replication problems), Group Policy (Event ID 4016 might suggest GPO processing errors).
4.Confirm Service Status:
Ensure that essential services tied to Group Policy and file sharing are operational without errors. Key services include "File and Storage Services", "DFS Replication", "Group Policy Client", and "Remote Procedure Call (RPC)".
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