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Salesforce for Outlook install fails with .NET Framework 4

Date de publication: Jun 28, 2026
Description

This article addresses installation failures that occur when installing Salesforce for Outlook (SFO) on a Windows computer, specifically when the installer attempts to install Microsoft .NET Framework 4.0 as a prerequisite. Salesforce for Outlook is a plugin that integrates Salesforce CRM data with Microsoft Outlook, allowing users to sync contacts, events, and emails.
During installation, one of the following two errors may appear:

Error 1 — Generic Trust Failure

Installation Did Not Succeed .NET Framework 4.0 has not been installed because: Generic trust failure

This error typically occurs when the list of trusted root certificates on the Windows computer is corrupted or outdated. This is a Windows configuration issue, not a Salesforce issue.

Error 2 — HRESULT 0xc8000222

Installation Did Not Succeed .NET Framework 4 has not been installed because: HRESULT 0xc8000222

This error typically occurs when the Windows Update temporary folder (SoftwareDistribution) has become corrupted. This is also a Windows configuration issue, not a Salesforce issue.

Résolution

Resolution for Error 1 (Generic Trust Failure)

This resolution repairs trust certificate DLL registrations on Windows and then reinstalls Salesforce for Outlook.

  1. Set Windows User Account Control (UAC) to Never Notify.
    1. In Windows 7, 8, or 10: open the Start menu, search for User Account Control, and set the slider to Never Notify. Save changes.
  2. Open Programs and Features (also called Add/Remove Programs):
    1. Windows XP: click Start > Run and type appwiz.cpl
    2. Windows Vista / 7 / 8 / 10: click Start and type appwiz.cpl
  3. Locate and uninstall the following applications:
    1. Salesforce for Outlook
    2. Microsoft Office 20xx Primary Interop Assemblies (either 2007 or 2010 version)
    3. Visual Studio 2010 Tools for Office Runtime
  4. Open the Command Prompt as Administrator:
    1. Windows 7: go to Start > All Programs > Accessories, right-click Command Prompt, and select Run as administrator
    2. Windows 8 / 10: click Start, type command, right-click Command Prompt, and choose Run as administrator
  5. In the Command Prompt, type each of the following commands one at a time and press Enter after each. Confirm that each command returns a success message before proceeding:
    1. Regsvr32 Softpub.dll
    2. Regsvr32 Wintrust.dll
    3. Regsvr32 Mssip32.dll
    4. Regsvr32 Initpki.dll
  6. Download and install .NET Framework 4.0 from Microsoft: http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=17718
  7. Reinstall Salesforce for Outlook.

Resolution for Error 2 (HRESULT 0xc8000222)

This resolution clears the corrupted Windows Update cache and then reinstalls .NET Framework 4.

  1. Close all Microsoft Office applications and all web browsers.
  2. Open the Services application:
    1. Windows 7: click Start and type Services.msc in the search field, then press Enter
  3. In the Services window, scroll down to locate Windows Update, right-click it, and click Stop. Do not close this window — you need to restart this service in Step 7.
  4. Press and hold the Windows key on your keyboard, then press R to open the Run dialog.
  5. In the Run dialog, type %windir% and press Enter. This opens your Windows system folder.
  6. In the Windows folder, find the folder named SoftwareDistribution, right-click it, and rename it to SDold.
  7. Return to the Services window and Start the Windows Update service again.
  8. Download a fresh copy of .NET Framework 4 from Microsoft and install it: http://www.microsoft.com/download/en/details.aspx?id=17718
  9. After .NET Framework 4 installs successfully, reinstall Salesforce for Outlook.
Numéro d’article de la base de connaissances

000384385

 
Chargement
Salesforce Help | Article