Scenario You have SharePoint 2010 Server Standard installed, but have got Enterprise license and need to upgrade license type of the SharePoint 2010 Server. Sometimes if you go to Central Administration -> Upgrade and Migration -> Convert License Type, you might see that you can't type your Enterprise license key into the textbox and there is no option to convert your license: Some people suggest that this is because you have the Enterprise license key already entered and you don't need to upgrade. This is not true. There is just a different routine to upgrade. Solution 1. Go to Central Administration -> Upgrade and Migration -> Enable Enterprise Features: 2. For the Select Feature Set option choose Enterprise and type in the Enterprise key into the Product Key textbox that will appear. Then click OK: 3. After some time you will see the message that SharePoint Server Standard has been successfully upgraded to Enterprise. Click OK: 4. Select E