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. 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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