I need to upgrade Exchange 2010 STD to 2010 ENT in-place - no unique key provided by MS

The existing Exchange server is 2010 Standard. I need the additional mail stores afforded by Enterprise. I ordered the 2013 Enterprise however the MC VLSC site indicates no KEY is required.

Several MVP sites indicate that the upgrade can be accomplished without a re-install running Set-ExchangeServer -Identity <SERVER NAME> -ProductKey <PRODUCT KEY>  where <SERVER NAME> is my server name and <PRODUCT KEY> is the Product Key of the Enterprise Edition of Exchange Server.

How is this accomplished without an Exchange Enterprise product key listed at the MS VLSC site?

I'm befuddled.
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Mick AndersonSr. VPAsked:
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AmitIT ArchitectCommented:
You need Enterprise key for 2010 not 2013. Then just apply the key and it will change to enterprise version, remember there is no role back option. I suggest you to call MS for Key issue.
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Mick AndersonSr. VPAuthor Commented:
Excellent the only key I needed was the generic key from my VLSC site (yes I did call MS). Thanks!
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