You can update an object extension registration by making a PUT request to its edit URL and supplying a modified an ObjectExtension in the request body.

Prerequisites

This operation is restricted to system administrators.

Procedure
1

Retrieve the object extension.

Use a request like this one, where ID is the ID of the extension that you want to retrieve. 

GET https://vcloud.example.com/api/admin/extension/object/ID

If you do not know the ID of the object extension, you can retrieve a list of all registered object extensions with a request like this one: 

GET https://vcloud.example.com/api/admin/extension/object
2

Examine the response to find the object extension's edit link. 

<vcloud:Link  
      rel="edit"  
      href="https://vcloud.example.com/api/admin/extension/object/83...0d39"  
      type="application/vnd.vmware.admin.extensibility.object+xml" />
3

Update the retrieved ObjectExtension.

4

Make a PUT request to the URL in the edit link, supplying the modified ObjectExtension in the request body. See Example: Update an Object Extension

Example: Update an Object Extension

This example updates the object extension created in Example: Register an Object Extension to enable it by setting the value of Enabled to true.

Request: 

PUT https://vcloud.example.com/api/admin/extension/object
Content Type: application/vnd.vmware.admin.extensibility.object+xml
...
<?xml version="1.0" encoding="UTF-8"?>
<ObjectExtension
   xmlns="http://www.vmware.com/vcloud/extension/v1.5"
   xmlns:vcloud_v1.5="http://www.vmware.com/vcloud/v1.5">
   <Namespace>vcdx.vmdeploy</Namespace>
   <Enabled>true</Enabled>
   <Exchange>example-exchange</Exchange>
   <Vendor>com.example</Vendor>
   <Selectors>
      <Selector name="urn:selector:providerVdc" />
   </Selectors>
</ObjectExtension>

The system updates the extension and returns an updated ObjectExtension element similar to the one shown in Example: Register an Object Extension.

Response: 

200 OK
Content Type: application/vnd.vmware.admin.service+xml
...
<vmext:ObjectExtension  
   xmlns:vmext="http://www.vmware.com/vcloud/extension/v1.5"  
   xmlns:vcloud="http://www.vmware.com/vcloud/v1.5"  
   id="83...0d39"  
   href="https://vcloud.example.com/api/admin/extension/object/83...0d39" >
   ...
   <vmext:Namespace>example-object</vmext:Namespace>
   <vmext:Enabled>true</vmext:Enabled>
   <vmext:Exchange>example-exchange</vmext:Exchange>
   <vmext:ContentType>XML</vmext:ContentType>
   <vmext:Vendor>com.example</vmext:Vendor>
   ...
</vmext:ObjectExtension>