This property indicates whether the filter has registered to be notified of authentication events. If the value is True, the filter will be notified when the server is initially authenticating the client. This property is one of the flags contained in the property FilterFlags, and should be considered read-only.
The following table describes this property:
| Data type | Boolean |
| Default value | Not applicable |
| Default inheritance | Not inheritable |
Accessible by IIS Admin Objects:
| IIsFilter |