The process is part of Microsoft’s infrastructure to keep software like OneDrive and Microsoft 365 (Office) up to date. You may encounter it in two main ways:

Listed as a running process under "All Processes".

is a legitimate background process on macOS specifically associated with Microsoft OneDrive . It functions as a "daemon"—a faceless task that runs continuously to handle updates for Microsoft applications without requiring manual user intervention. What is StandaloneUpdaterDaemon?

Despite the "unidentified" warning, this is a known behavior where macOS security settings occasionally fail to display the developer's verified name for certain background helpers.

Appearing in the Login Items or Background Tasks section, sometimes flagged as coming from an "Unidentified Developer".