Hello CU.Dell.User,   You have probably already verified you are inputting a valid service tag that is on the pull out luggage tag on the front of the server. Try it on this link to see if it comes up:  [URL]   See if you have this document. It describes what to do for third-party purchases like eBay: Ownership Transfer and Dell Product Registration Guides [URL] Allow 7-10 business days for Domestic transfer and 15 business days for International Transfer.   If you still have issues you should contact Customer Care: 1 (800) 624-9897  
Purchased an R740 off eBay, and Dell would not allow us to enter the Service Tag to download drivers. (It asks for login and then tells that "you are not authorized to view this product". So, I tried to transfer ownership at [URL] . But, once I enter the Service tag the page shows a popup saying "Redirecting to EMC Support" and then put me back at the drivers page. Talk about an infinite-loop. Can one of the Dell support team members tell me how I can resolve this? (Getting specific drivers by entering the Svg tag is important; Ownership transfer, if we can do it, would be nice, but not overly critical I suppose).
R740 Ownership Transfer