OneDrive, Microsoft's file sync app formerly known as SkyDrive, lets you store your files online, edit Office documents in the free Office Web Apps, and easily access your online files from your PC.
Your reviewer sees the current image or PDF proof link and revision on the task before deciding.
Your approval task shows whether the reviewer can open the current proof before the due date, with a request for a corrected link when needed.
Keep reviewers aware of changes to a proof before they act on a decision. Your task shows the mismatch and asks for confirmation.
Your review tasks show the current image revision and reviewer due date, so the next handoff is clear.
Your coordinator gets both revision links in chat when the task and current proof differ, with the task held for a human choice.