Dynamics NAV 2009 and additional SPNs > Are any additional SPNs required for additional webservice instances, running under the same account, on the same server? (Assume port sharing, if this matters.)  No, Because SPN uniqueness is defined by protocol name, address (and sometime port) and account, you do not need new SPN if all this is same. Chain of trust If you need to be able to pass Kerberos authentication between services, you need to create the chain corr 
Leggi tutto il post...