Equisys technical notes

Technical guidance, explanations and fixes for our products

PRB: Outlook Addin not installed for users on Terminal Services with a 64-bit Outlook Client



ID: ZTN1929

This Zetafax technical note applies to:

  • Zetafax 2012 Outlook Feature Pack


When performing an install of the Zetafax Client Applications on a terminal server with a 64-bit version of Outlook installed, the Zetafax Outlook addin is not installed.


64-bit versions of Outlook require addins to be added through the 64-bit area of the registry. The Zetafax Client Applications installer is a 32-bit installer, as such, it is only capable of inserting registry entries into the 32-bit area of the registry. As a result of the missing information in the 64-bit area of the registry, Outlook is unable to correctly install the Zetafax addin.


In order to enable the Zetafax Outlook Addin, the following steps should be followed:

Registry Editor warning

WARNING: Using Registry Editor incorrectly can cause serious problems that may require you to reinstall your operating system. Equisys cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved.

For information about how to edit the registry, view the " Changing Keys and Values" Help topic in Registry Editor (REGEDIT.EXE) or the " Add and Delete Information in the Registry" and " Edit Registry Data" Help topics in REGEDT32.EXE. Note that you should back up the registry before you edit it. If you are running Windows NT or Windows 2000, you should also update your Emergency Repair Disk (ERD).

  1. Copy all the text between the chevrons (< < < > > > ) into a blank text file, adjusting the Manifest path to your local Zetafax Client install folder if necessary (please note that folder paths require a double backslash rather than the usual single backslash).
  2. < <  

    Windows Registry Editor Version 5.00


    " Description" =" Zetafax Addin for Outlook"

    " FriendlyName" =" Zetafax Addin for Outlook"

    " LoadBehavior" =dword:00000003

    " Manifest" =" C:\\Program Files (x86)\\Zetafax\\Office\\Outlook Extensions\\ZetafaxOutlookAddin.vsto|vstolocal"

    > >  

  3. Save the file as ZFOutlookAddinTS.reg
  4. Double click ZFOutlookAddinTS.reg and accept the prompts to enter into the registry.


This has been identified by Equisys as a problem with the software versions given above.

Last updated: 28th February 2013 (NT/WK/TM)

Keywords: Outlook 64 bit Terminal Services

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