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.
Keep signed supplier agreements and their signing proof together in the right supplier folder, so your team can find both when needed.
Your sender can see whether a quote has cleared internal review before it goes to a customer. Missing sign-off stays on the document for follow-up.