Registering a COM Object as an Agent

In addition to the normal registration of your COM component, you need to put the following information into the registry for your implementing COM class:

HKEY_CLASSES_ROOT \ CLSID \ {Your Agents CLSID} \ Implemented Categories \ {50F45350-D0AF-11d0-9836-00AA006D27AB}
    (Default Value) = 'Exchange Event Handler Category'