We resolved this issue by deleting the original shared review files and storage folder, creating a new folder on our network to store and collect collaborator comments, and then re-sending out a new shared review to our SMEs. Until we upgrade later this year to the latest SharePoint version, we have been using our current version of SPoint and using a network drive to store and collect our shared review files instead of storing and sending our reviews to a SharePoint site. I believe the combination of the older version of SharePoint, the network, and the possibility of original shared review being corrupted. Anyway, we are back up and running correctly, but looking forward to the SharePoint upgrade. Thanks for your quick response. Regards