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You cannot configure ACL to the drive root by using icacls.exe
Article ID: 967539 - View products that this article applies to.
The first time that you try to run the icacls.exe utility to configure access control lists (ACL) on the root drive of a Windows-Server-2003-based computer, you may receive the following error message:
icacls e:\ /grant Adminstrator:(F)
INTERNAL ERROR: invalid aclsize
e:\: An internal error occurred.
Successfully processed 0 files; Failed processing 1 files
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This issue occurs because the root ACL is set to an incorrect value.
To resolve this issue, execute the following command before you run the icacls.exe utility:
icacls E:\ /resize
This command sets the length of drive root ACL to the correct value.
Article ID: 967539 - Last Review: March 14, 2009 - Revision: 4.0