The following error can occur if the IPv6 protocol is deactivated on an Exchange 2010 server:
Process MSEXCHANGEADTOPOLOGYSERVICE.EXE (PID=2864). Error during topology detection. Error: 0x80040a02 (DSC_E_NO_SUITABLE_CDC)
Various Exchange services are then not started or remain stuck with the status "Starting". In my case, the solution was to reactivate IPv6.
