Exchange Server Toolbox Changelog

What is New in Exchange Server Toolbox?

Version 6.0

Improved email archive - fast, stable and fail-safe

  • The archive of the Exchange Server Toolbox is now multi-client capable. A separate archive can be created and managed for each client (domain or list of email addresses).
  • Each client archive is searchable in the Exchange Server Toolbox interface.
  • Each client has his own user administration to configure the access rights to the archive. The access rights from the Active Directory are used as a starting point to keep the configuration effort low.
  • The Exchange Server Toolbox Outlook Add-In for archive search can connect to a client archive.
  • The email archive of the Exchange Server Toolbox has been fundamentally revised, Import du Export and the search in the archive has been massively accelerated.
  • To prevent the loss of the email during processing, the archiving now stores the email temporarily.
  • In case of multiple Exchange Server Toolbox installations, archiving is only performed on one installation.
  • In the archive search, a list of searchable email mailboxes can be displayed.

Email processing - Faster, more resilient and less memory consumption

  • Significantly improved performance of the Exchange Server Toolbox service, improved stability and reliable failover behavior.
  • The memory consumption during email processing has been drastically reduced - by far more than half.
  • The processing speed has been significantly increased.
  • Spam and virus scans are now only performed once per email and not, as previously, once per rule that uses a corresponding condition.
  • The Exchange Server Toolbox now scales very well on systems with high email volumes.

Distributed installation - conveniently manage multiple servers

  • It is now possible to automatically transfer the configuration of one installation to another installation. This is useful when multiple Exchange servers are running the transport role and saves having to manually keep multiple configurations at the same level.
  • It is also possible to transfer only the Active Directory information for licensing to another installation in order to run an installation in a DMZ.

New graphical user interface - comfortable configuration

  • The graphical user interface has been revised and now offers even more configuration comfort and clarity in a new, modern design.
  • The UI now uses fewer dialogs and is more clearly structured a uniform design language enables intuitive operation.
  • New filter, grouping and sorting functions for the lists of rule conditions and actions, as well as in the event log view, the new user administration, the new license administration and the new client overview make it easier to keep track of things.
  • The archive search interface and the Outlook Add-in interface have also been improved and now make searching even more convenient.

Management of licensed mailboxes - simple and transparent

  • The email addresses covered by the license are now configurable. Newly added email addresses that exceed the number of addresses covered by the license will work for 30 days before they are deactivated.
  • It is now possible to manually specify email addresses to be processed.
  • When the number of licensed mailboxes is exceeded, now only one email notification is sent to the configured administrator address.

Other improvements in the archive

  • Permissions of public folders are now correctly evaluated by the archive search
  • Signed or encrypted emails can now be excluded from the rule processing to prevent them from being damaged. This option is enabled by default.
  • It is now possible to configure NTFS compression of the archive folder
  • The permissions of shared mailboxes are now correctly evaluated by the archive search
  • The archive search now allows the use of wildcards when searching for attachments.

Further improvements in the Outlook Add-In

  • The user interface for archive search in the Add-In has been revised.
  • The settings dialog of the Outlook Add-In was improved.
  • The Outlook Add-In is now always loaded correctly by Outlook. It can no longer be deactivated because of too long startup time.
  • Stability problems in the ExchangeServerToolbox Outlook Add-in have been fixed.
  • Dialogs opened in the Outlook Add-in no longer disappear behind the Outlook window when it is brought to the forefront again.
  • The Outlook Add-in now requires NET Framework 4.7.2.

Further improvements of the configuration interface

  • The settings such as column width, grouping and filter for the different list views (Event Viewer, Archive Search, User List, Client List) are now saved when the interface is closed and restored the next time it is started.
  • New filterable columns have been added to the Event Viewer.
  • The Eventlog view has been revised. Filtering in the columns is now even more comfortable and the expandable detail view improves the overview.
  • A problem that caused the user interface to freeze was fixed.

Improvements of the rule system

  • New rule category for incoming emails. In addition to the previous categories "Incoming", "Internal" and "Outgoing" there is now a new category " Arriving".
  • A new condition has been added to the set of rules to specify to which clients the actions should be applied.
  • The new rule condition "Email is signed or encrypted" allows to create rules for encrypted emails.
  • The new rule action "Add attachments" allows to add all files from a folder as attachments to an email.
  • The new rule condition "Sender is whitelisted" checks if a sender is on the SpamAssassin whitelist.
  • The new rule condition "Sender is in Blacklist" checks if a sender is on the SpamAssassin Blacklist.
  • The new rule action "Change SCL value" allows to set the SCL value for emails.
  • The new option "Convert images" in the "Add text to email content" action now allows to convert images used in HTML with local paths to inline attachments. This allows to use HTML components stored as "Text Template", e.g. to automatically add email signatures with images to an email.
  • The new rule condition "Mail contains certain text in Virus Report" allows to react to certain virus detections.
  • The new rule "Machine name matches" allows to use certain rules only on certain machines in a distributed installation (master / client installation).

Spam and virus protection

  • New version SpamAssassin in a Box V2.5.0.18.
  • New SpamAssassin version V3.4.4.
  • Wildcards can now be used for the Auto-Whitelist exceptions.
  • New version of ClamAV in a Box V1.0.5.14.
  • New version of the virus scanner: ClamAV V0.103.0.
  • The signature update no longer blocks ClamAV.
  • The RAM consumption has increased due to the new way of signature management.
  • If necessary the value for "ConcurrentDatabaseReload" in the file "clamd.conf" can be set to "No" to restore the old behaviour with less RAM consumption.

Automatic error notification and failover

  • Improved system for automatic error notification: Errors can now be sent regularly to a configurable email address via another mail server.
  • The mail server that is used by Exchange Server Toolbox to send emails can now be configured. It is possible to change the server, the port and the authentication data (username, password and security procedure).
  • If an email could not be processed correctly, it will be saved to disk. The number of emails saved in this way is limited and can be configured.
  • New debugging options allow saving the emails before and after the various processing steps of the Exchange Server Toolbox.

Fixed problems and errors

  • Appointment invitations and calendar entries sent externally are no longer damaged.
  • New mail parser for processing TNEF emails without conversion to MIME emails.
  • Problems with TNEF encoded emails were fixed.
  • Problems with Exchange Server 2019 detection were fixed.
  • Stability when used with hMailServer is improved.
  • Fixed a problem with the direction of emails with IPv6 addresses.


  • Exchange Server Toolbox now uses a new license management. Starting with version 6.0 new license keys are valid and replace the previously used license keys. The new keys can be found in the customer area at "Downloads".
  • The license check now also works correctly when using multiple domains.

New system requirements

  • Microsoft Exchange Server 2007 & 2010 is no longer supported.
  • Microsoft Windows Server 2008 is no longer supported.
  • Microsoft Small Business Server (SBS) 2011 is no longer supported
  • Support for Microsoft Exchange 2003 has been discontinued.
  • MySQL v5.5 or higher is required to use MySQL archives.
  • Exchange Server Toolbox v6.0 requires Microsoft .NET 4.7.2
  • The Outlook add-in requires Microsoft .NET 4.7.2.

12 November 2020