None of these worked for me. As soon as I moved SyncServicesAgent.app onto the desktop, it seemed to regnerate itself in the original folder. I even resorted to moving the file into Trash, to no avail.
What did allow the new instal to continue, was renaming the file SyncServicesAgent.app. I was prompted to confirm whether I wanted to change the name of a file in use, which I did. It stopped that application running, and allowed the instal to continue. Office installer then told me I had reinstalled Outlook successfully, so things looked good at that point. It created a new SyncServicesAgent file.
However, upon trying to launch Outlook, I got nothing but crash logs and succeeded eventually only by restoring a functioning instance of Outlook from Time Machine (which had previously been unsuccessful several times before trying to instal from the CD.)
Still haven't got my data back in, which is proving problematic since the most recent Time Machine backups have disappeared from the timeline since I first started this adventure, but I'm now closer than I was.
Hope this may be a useful addition to the knowledge bank on this topic. In short, Activity Monitor alone isn't an answer, but moving SyncServicesAgent.app to the desktop isn't foolproof either.