addinutil.exe

C:\WINNT\Microsoft.NET\Framework\v3.5\
C:\WINNT\Microsoft.NET\Framework\v4.030319\

This tool is part of the .NET Framework and must be run from the command line.
This is an Addin deployment cache updating tool.
This tool updates the cache file in the specified folder informing the add-in model that new add-in segments have been deployed into this folder.

The pipeline root should be a folder containing subfolders for various add-in segments like host adapters, contracts an optional Addins subfolder etc.
The addin Root path should be a folder that contains one subfolder for each add-in.

Options
- Rebuild - forcibly rebuild the cache file, even if it isn't necessary
- Silent - ignore warnings about broken add-ins etc