Select a project setting and provide a Server Url to a ReferenceServer from UA-.NETStandard-master for example

Inside ServerInternalData.CreateServerObject(....) you might modify the code as in the following example

ServerObjectState serverObject = m_serverObject = (ServerObjectState)m_diagnosticsNodeManager.FindPredefinedNode(
ObjectIds.Server,
typeof(ServerObjectState));

            serverObject.Auditing.Value = true;

or in other way that you like.

The result should be that all auditing event type messages should be allowed. The Server.Auditing variable value play a role in filtering the auditing event messages ...

In the compliance tool script part2.xml.js of version 1.4.9.398 there is the following definition:

{
"NodeClass": "NodeClass.Variable",
"NodeId": "i=2742",
"BrowseName": "Auditing",
"ParentNodeId": "i=2004",
"DataType": "BuiltInType.Boolean",
"DisplayName": "Auditing",
"Description": "A flag indicating whether the server is currently generating audit events.",
"Required": true,
"References": [
{

The 'i=2742' node identifier it looks for the ServerType.Auditing node defined in Types\ObjectTypes predefined collection of the server.

But the OPC Netstandard stack code defines another node Server.Auditing = 2994 that is an active variable node that should be changed instead modifying and use base type definition ServerType.Auditing !

Consulting the OPC Documentation for the auditing description there is no reference to the ServerType but always says about Server and Client Auditing.

Because there is no explicit description about auditing usage in OPC specification it wouldn't be better to consider using Server.Auditing = 2994 instead of ServerType.Auditing = 2742 node value as base auditing filtering testing criteria!?