I copied two trees, a source and a destination, that I copied with robocopy like this:

robocopy /MIR C:\Windows\System32\tasks\ C:\temp\robocopyTasks\out\

robocopy /E /Copy:S /IS /IT C:\Windows\System32\tasks\ C:\temp\robocopyTasks\out\

Then I compared the permission using icacls output the permissions on both, and the only difference seems to be that the original files contain a long string of characters which I've seen before; and I know it represents a user or a group in the system but I don't remember what it is called. The strings look like this:


They can be matched with this regex in VIM:


1 Answer 1


It's a SID, or Security Identifier. If it's showing the string rather than a "friendly name," it sounds like the new server doesn't recognize the account.

  • I'm making the copies on the same machine. (going to update my post)
    – leeand00
    Apr 17, 2015 at 15:35
  • Interesting. Well, for some reason, it's confused. (Network hiccup?) Apr 17, 2015 at 15:36
  • I'd actually like to do the same thing on a Windows 2003 server; I'm testing it on my Windows 7 machine first; which is why I'm using the older syntax instead of /SECFIX
    – leeand00
    Apr 17, 2015 at 15:37
  • I updated my post to include my robocopy command.
    – leeand00
    Apr 17, 2015 at 15:38
  • 2
    This happens when you create a new local Administrator account, and copy files belonging to another local Administrator account. The new account cannot access files belonging to the old account even though both accounts are Administrator
    – eyoung100
    Apr 17, 2015 at 17:42

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