The Taxonomy feature (Feature ID “73EF14B1-13A9-416b-A9B5-ECECA2B0604C”) has not been activated
If you are getting this error when try to add a custom column of the Managed Metadata type to your site collection then simply use the following command to activate this feature:
STSADM -o activatefeature -id 73EF14B1-13A9-416b-A9B5-ECECA2B0604C -url http://<server> -force
Where the <server> feature is the name of the server, since this is a farm feature.
If you are more inclined to use Powershell, and why wouldn’t you be, then use this cmdlet:
Enable-SPFeature -id 73EF14B1-13A9-416b-A9B5-ECECA2B0604C -URL <SiteCollectionURL>
I don’t know why this isn’t enabled (since on other installation I didn’t see this error) but at least its a fix.
Good luck 
Category: General
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Hi,
Thanks for sharing the solution.
Thanks
Sohel
hi there, this has been plaging me for some time. when i go to setup the “Wiki Categories” for an Enterprise Wiki it tells me “The required feature is not enabled for this column type” and then “The Taxonomy feature (Feature ID “73EF14B1-13A9-416b-A9B5-ECECA2B0604C”) has not been activated” so…. I head on over to the Server and go in to PowerShell to turn it on using the formentioned command only to have it tell me “Enable-SPFeature : Feature ‘MetaDataNav’ (ID: 7201d6a4-a5d3-49a1-8c19-19c4bac6e668) is already activated at scope ‘http://'.
round in circles we go!!! ANY IDEAS!?
This solved my problem! Thank you so much! The issue I was experiencing was that when I tried to set a Submission Policy from Closed to Open within a term store, I got the error “This operation cannot be completed. The term store may be unavailable.” I could create new term stores and terms, and permissions all seemed to be set correctly, so it was a head-scratcher. Thank you again for these instructions to activate the feature!
[...] Fortunately it is pretty easy to fix, you just have to enable the Taxonomy feature. [...]
[...] The Taxonomy feature (Feature ID “73EF14B1-13A9-416b-A9B5-ECECA2B0604C”) has not been activated Filed Under: Know How Tagged With: SharePoint 2010, SharePoint管理, リスト/ライブラリ, 管理されたメタデータ [...]