During a reinstall, the existing operating system image is replaced and the system is returned to a newly provisioned state according to the selected image or template. That usually means previous configuration and local data on the affected system are no longer available afterward.
Reinstalling is useful when you need a clean environment, but it is not the right tool if you are trying to preserve the current system exactly as it is.
Always confirm you have your backups, configuration notes, and deployment steps ready before you trigger a reinstall.