However, malware authors sometimes use names that mimic trusted Microsoft components to evade detection. Therefore, verification is essential.
This is a default Windows system file. It is a downloaded add-on for Microsoft 365 / Azure environments. azinfoprotection-ul.msi
Sometimes after an AIP client upgrade or removal, the MSI reference for azinfoprotection-ul.msi remains in the Windows Installer cache. Users might see an entry they cannot uninstall, or Windows may repeatedly ask for the original MSI path when repairing Office. However, malware authors sometimes use names that mimic
However, the technology has entered a "modernization journey" where the AIP add-in was officially . It has been replaced by Microsoft Purview Information Protection , which integrates these labeling features directly into Microsoft 365 apps without needing a separate MSI-based add-in. The Story of the Silent Sentinel It is a downloaded add-on for Microsoft 365
Microsoft provides a dedicated tool to clean up orphaned MSI installations: