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[Legacy Outlook Add-in] General installer error (0x8007007E) when trying to install the Outlook Add-in

During the installation of the Outlook Add-in, you might receive an error message that will halt the installation (the error code might differ from that shown in the screenshot):

The following Microsoft Office solution cannot be installed due to a general installer error: InovaPushAddIn.vsto



We have most commonly seen this error occur with users running Windows 10 and Office 2016 on a Microsoft Surface Pro.

Workaround :

  1. Download and install Visual Studio 2010 Tools for Office (Microsoft link)
  2. Install the Outlook Add-in again (setup.exe)
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