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Event ID 30823: The connection was terminated due to one or more IO request timeouts

Windows Event ID Lookup: What Windows event IDs mean: 4625, 4624, 4740, 6008, 41, 7045, 1102 and 3,000 more, with Windows' own message text, the fields and what to check.

Look up a Windows event ID from Event Viewer, a SIEM alert or a log export: what it means, the fields it records, and what to check. Many IDs are used by more than one source (event 41 is both a Kernel-Power crash and a boot error), so every definition is shown, the one people usually mean first. The message text is Windows' own, read from the event providers of Windows 10.0.26200.0, 2026-10-28; the notes are ours, based on Microsoft's security auditing reference.

Try: 4625, 4624, 4740, 6008, 41, 1074, 7045, 1102, 4104, 1149

The connection was terminated due to one or more IO request timeouts.

Event 30823
SMBClient
SMBClient/Connectivity log
Error
Message and fields (as Event Viewer shows them) 
The connection was terminated due to one or more IO request timeouts.

Error: …

Name: …
Server address: …!S!
Client address: …!S!
Instance name: …
Connection type: …

Guidance:
This indicates a problem with the underlying network or the storage stack on the remote server. IO operations were not completed within the allotted time. The application may not see this failure because IOs are usually retried on a different connection. This event is for diagnostics only.