The full retail key will be included on ORIGINAL PAPERWORK + COA. This allows you to get started immediately.Just contact me for pricing. No, This version is not downgrade-able although that is available via the OPEN LICENSING PROGRAM (Pricing available upon request). This is distributed electronically via authorized partners and you will receive the paperwork as shown in the picture. Note: Purchasing a key card or just a key without official paperwork, or a retail box is not advised from Microsoft as they may be stolen or counterfeit. This edition supports 1 to 5 mailbox databases. On-premise (perpetual) full retail license. This is not a subscription. I have A+ feedback for this reason. All of our customers, including all international buyers, have been thrilled. The item "Microsoft Exchange Server 2016 Standard with 60 CALs (COA) + ORIG MS USB DRIVE" is in sale since Tuesday, December 10, 2019. This item is in the category "Computers/Tablets & Networking\Software\Operating Systems". The seller is "sweetfancymoses5" and is located in Temecula, California. This item can be shipped worldwide.