Proplus.ww Ose.exe -

In MSI-based volume license editions of Office (LTSC 2021, 2019, 2016), Ose.exe runs as a service or a transient process during any installation or modification task.

: If ose.exe is flagged as missing during an update or repair attempt, the installer would offer to download only that specific component from Microsoft's servers rather than asking the user to find the original physical disk or full installer.