ITgirl from United States – 03 18 2012, 6:31 PM Report Spam I have two conflicting answers. ORI- is answer A record for autodiscover .Golfer is answer CNAME record for nwtraders.I think it is CNAME. But you can also create A record. So, which is the best answer??You have Exch 2010. The org is authoritative for a domain named nwtraders.com. You need to ensure the federated partners can locate the CAS servers in the ORG. Which record should you create in the external DNS?A.