You are trying to download the Add-in and you get an error that says Visual Studio Tools for Office Solution Installer can't be found.
You have received an error message stating that the system cannot find the file specified.
Visual Studio Tools is unable to be downloaded or found by our Outlook installer and requires a manual download.
The add-in installation may fail when installing the Visual Studio Tools for Office (VSTO), which is required to run the Microsoft Outlook add-in. Normally, VSTO is installed if necessary during add-in installation; however, sometimes installing VSTO manually may help.
If you already have VSTO installed, or are not sure, you will want to remove the existing installation first. Follow these instructions:
Visual Studio Tools for Office setup can be downloaded directly from Microsoft. Click the Download button on this page to download the vstor_redist.exe file to your computer. Once this file is downloaded, run the installer.