3.3.5.2 GPO Extension Update
Whenever an administrative tool invokes a Group Policy extension for the abstract element Administered GPO and that extension modifies the GPO, the administrative tool invokes the GPO Extension Update sequence, which produces the LDAP modifyRequest message (as defined in the specification of the GPO Extension Update Message, section 2.2.8.2) from the client to the server. The GPO attribute versionNumber is incremented according to the current value associated with the "Version" key in the <GPO path>\gpt.ini file.
If the value of the modifyResponse message's resultCode is integer 0, it indicates success. Any other resultCode value indicates a failure.
The GPO File System Version Update (section 3.3.5.4) file access messages make up the remainder of the GPO Extension Update message.