Is your Corporate Edition still has valid support? because if your product does have valid support, it means that you are eligible with the free version upgrade. the upgraded product is the symantec Multi Tier protection 11.0.2. and this is a bundled product with Symantec endpoint protection, Symantec mail security for exchange and for domino as well the premium antispam. BUt if your product does not have valid support it means that you are not eligible with the free version upgrade.