You can manually trigger an update of Office Click-to-Run installations, without starting any of the Office applications. This can be useful in VDI-environments where it may be necessary to update Office in the source image.
To trigger the update, start the Click-to-Run client with the /update switch.
Perform the update (will show a progress bar):
"C:\Program Files\Common Files\microsoft shared\ClickToRun\OfficeC2RClient.exe" /update user
Silently perform the update (don't show progress bar and force Office apps to restart):
"C:\Program Files\Common Files\microsoft shared\ClickToRun\OfficeC2RClient.exe" /update user displaylevel=false forceappshutdown=true
Both commands will tell Office to update itself through the internet using the current channel. You can also change the update channel to something else:
"C:\Program Files\Common Files\Microsoft Shared\ClickToRun\OfficeC2RClient.exe" /changesetting Channel=Current
The current channels are (more info):
|Monthly Channel (Targeted)||FirstReleaseCurrent|
|Semi-Annual Channel (Targeted)||FirstReleaseDeferred|