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Part 2: The 32-Bit/64-Bit Drivers : The Sybase Wire Protocol Driver : Connection Option Descriptions : Service Principal Name
  
Service Principal Name
Attribute
ServicePrincipalName (SPN)
Purpose
The service principal name to be used by driver for Kerberos authentication.
Valid Values
servicePrincipalName
where:
servicePrincipalName
is a valid service principal name.
If unspecified, the value of the Network Address option is used as the service principal name. If Authentication Method is set to 0 or 1, the value of the Service Principal Name option is ignored.
Default
None
GUI Tab
Security tab