In the Change Auditor Client under Administration Tasks | Forest | Active Directory | Attributes, the list of unmonitored attributes will not load. The blue progress circles spins but never completes and the list box never gets populated.
This occurs when refreshing attributes for any of the three object types (computer, group, user).
Restart the Change Auditor Coordinator in order for it to select a new Global Catalog server.
The Change Auditor Coordinator can be configured to use predefined Global Catalog server for Name Resolution, please create the following registry entry on the Coordinator Server: