Hi Dave,
This issue was posted to the Service Health Dashboard (SHD) as incident SP146930 starting at Aug 21 2018 3:52 PM (UTC). The user experience of this incident is : Users were unable to move or delete Microsoft Word documents.
Now, Service Health Dashboard has indicated that issue SP146930 has been resolved as of: Wednesday, August 22, 2018, at 3:26 PM UTC. If you are still experiencing an issue, please post a new thread on our forum.
Regards,
Qing