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ITsVISTA KB-Link: KB2570355

Folder Redirection fails with the error ERROR_SEM_TIMEOUT or the semaphore timeout period has expired

You have a computer running Windows Vista or Windows 7 in a domain. You find out the Folder Redirection policy is not working on the client machine. When you look at the event log, you see following event logged:

Log Name: Application Source: Microsoft-Windows-Folder Redirection Date: <Date & Time> Event ID: 502 Task Category: None Level: Error Keywords: User: <User Name> Computer: <Computer Name> Description: Failed to apply policy and redirect folder "Documents" to "<a network share>". Redirection options=0x1219. The following error occurred: "Failed to copy files from "C:\Users\<UserName>\Documents" to "<a network share>". Error details: "The semaphore timeout period has expired".

For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB2570355.

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