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Article ID: 120970, created on Apr 9, 2014, last review on Jul 14, 2018

  • Applies to:
  • Operations Automation 5.5
  • Operations Automation 5.0


The task "Revoke permissions from public folder ..." for Exchange 2010 fails with the following error:

Public folder user "NT User:S-1-5-21-2712436344-3576784617-3866519510-156852" doesn't exist. A valid public folder user should be a mail-enabled user, mailbox, or distribution group.


It happens because the user that owns this permission has been already removed.


Remove such permissions using the script 'CleanMissedPermissions.ps1' from this link:

  1. Get the root folder of the customer's organization where this error happens (you can find it in Provider Control Panel on the screen located at Services > E-mail > Organizations > <organization>).
  2. Place the script on the server with the Mailbox role.
  3. Run it in the following way:

    PS> .\CleanMissedPermissions.ps1 -RootFolder "\P000000XXX"

    where P000000XXX is the root folder of the customer's organization

  4. Restart the task.

Note: This may in some cases leave an object in inconsistent state. Please see KB#2247 for details on how to deal with out-of-sync objects.


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