SharePoint 2010: The "Product Key" Field is Disabled
Issue
When converting a "Standard" licence to an "Entreprise" licence, by using the "Convert farm license type" functionality:
http://spasipe.files.wordpress.com/2012/09/110.png?w=595
The field where you're supposed enter the product key is disabled.
http://spasipe.files.wordpress.com/2012/09/36.png?w=600&h=112
Solution
Follow the instructions of this Technet article : use the link "Enable Enterprise Features":
http://spasipe.files.wordpress.com/2012/09/27.png?w=595
Select "Enterprise", and enter the product key.
http://spasipe.files.wordpress.com/2012/09/48.png?w=595
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