The unregister server object extension (SOE) operation in the ArcGIS Server Administrator Directory always gives a successful response even if the SOE specified name does not exist on the ArcGIS for Server site.
Last Published: March 23, 2016ArcGIS for Server
Bug ID Number
January 20, 2016
July 28, 2020
ArcGIS for Server
The bug has been fixed. See the Version Fixed and Additional Information, if applicable, for more information.