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Event ID 5145: A network share object was checked to see whether client can be granted desired access

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

A network share object was checked to see whether client can be granted desired access.

Event 5145
Security-Auditing
Security log
Audit Success / Audit Failure

A network share object was checked to see whether access could be granted: one event per file or folder access over SMB, so it's very noisy.

What to check: Enable it only where needed (Detailed File Share auditing).

Related: 5140, 4663

Message and fields (as Event Viewer shows them)
A network share object was checked to see whether client can be granted desired access.
	
Subject:
	Security ID:		…
	Account Name:		…
	Account Domain:		…
	Logon ID:		…

Network Information:	
	Object Type:		…
	Source Address:		…
	Source Port:		…
	
Share Information:
	Share Name:		…
	Share Path:		…
	Relative Target Name:	…

Access Request Information:
	Access Mask:		…
	Accesses:		…
Access Check Results:
	…