You tend to forget about the old but still usefull tools: Domino Configuration Collector
Lotus Domino automatically makes copies every time a server document or a server configuration document is created or modified. This is a document you can use to find out who made the last change to the server configuration and what they did.
First and most important, this is not a new feature. Here’s a Knowledgebase article about the collector from 2004-09-12.
There is also a free tool available to read these DXLs that will actually reconstitute the document contents.
The wonderful and knowledgable Andy Pedisich has a great article on the Domino Configuration Collector. Read it now!