Hi @pvishnu, thanks for the reply. Actually I am trying to create an entity or update an entity if already existed by its unique attribute (QualifiedName), instead of first getting a guid. In this case, post v2/entity seems to be the best fit. It can update the attributes of the entity but it cannot add classification to it. Can it work as expected? If so, that will be ideal.  Also, I tried what you suggested, but I still got an error: There was an error processing your request. It has been logged (ID ccfeb9583f4b2242). Where can I see the log?  ... View more