When you opt into the Microsoft Update Improvement Program, your WSUS server will send information to Microsoft about the ...

When you opt into the Microsoft Update Improvement Program, your WSUS server will send information to Microsoft about the quality of updates. This information includes:

How many computers are in the organization.
How many computers successfully installed each update.
How many computers failed to install each update.

This information is used to improve the quality and reliability of the updates Microsoft provides.

None of the information collected is used to identify or contact you or your organization.