We are installing (or trying to) Vault 5 on a 2003 server which is a domain controller. Figured out to use \autodeskvault as the username, but now we get the error "No Mapping between accounts and security IDs". I've looked all over the web for an answer, and it seems that this is a MS / SQL issue? We are installing vault with the little 2GB 'mini sql' so I don't know what the heck to do here. A little help? Pleeeeeeaaaaseeeeee?!?!