Dell Storage Manager 2020 R1 Administrator's Guide

Description	SMB file access is denied due to a sharing conflict.
Cause	When a file is opened using the SMB protocol, the opening application communicates the sharing mode that must be used while this file is open. This sharing mode describes what other clients' activities are allowed on this file, while it is open. This definition is sent by the application and the client cannot control/configure it. Once there is a violation of the sharing definition, the client receives an access denied error and an event is issued.
Workaround	This is an informative event. The administrator may contact the locking client and request to close the application referencing this file. It could be that the application that opened the file did not shut down gracefully. It is recommended to reboot the client if possible.

SMB File Sharing Conflict