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This problem is usually caused by the user lacking permissions. You can give the user which runs the Exchange Server Toolbox Service access rights to the folders or you can reinstall the service and create a new user. For the latter solution please refer to this article: https://knowledgebase.jam-software.com/7481

You can find backups of your blacklist and whitelist settings in the following folder: „C:\Windows\System32\config\systemprofile\.spamassassin\backup“


In case these folders are empty or missing you can try to restore the file user_prefs from one of the following directories using a filesystem backup:

  • C:\Windows\System32\config\systemprofile\.spamassassin\
  • C:\Windows\SysWOW64\config\systemprofile\.spamassassin\

This error occurs when the Exchange Server Toolbox could not access the Active Directory. You can manually create the Group Account instead.

  1. Open the Active Directory Users and Computers console.
  2. In the navigation pane on the left, select the Users container
  3. Right-click the Users container, click New, and then click Group
  4. In the Group name text box, type ESTMailArchive
  5. In the Group scope section, select Global
  6. In the Group type section, click Security
  7. Click OK to save your group

Members of this group have full archive access rights and can find every email using the archive search.

Please reinstall the Exchange Server Toolbox Service and create a new user during the installation. To do so please follow these steps:

You can find the file ESTInstall in the following folder:

C:\Program Files (x86)\JAM Software\Exchange Server Toolbox\bin

To use the argument /force you can start the installation with the command line tool. Start cmd and enter the following commands:

  • cd C:\Program Files (x86)\JAM Software\Exchange Server Toolbox\bin
  • start ESTInstall.exe /force

Alternatively, you can create a shortcut of ESTInstall. Right-click it and add /force at the end of "Target".

Search in C:\ProgramData\Microsoft\Crypto\RSA\ and all subfolders for the folowwing files:

1.     19c988cf76b533f74aaffc201e63f98e_0d5fcf7f-9733-4ba0-a71e-c5b558768432

2.     f686aace6942fb7f7ceb231212eef4a4_018e9184-1f67-46e7-b4c1-c3539d31c630

Make sure that the user under which the Exchange Server Toolbox service is running has full access on these files.