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3.3.5.7.2 TGT without a PAC

If a TGS request includes a TGT without a PAC, the KDC SHOULD add a PAC before issuing the service ticket. This occurs when the TGT was issued by a pure realm[RFC4120] that is trusted by the domain. The PAC MUST be inserted when there is a mapping to a domain user. There are two ways to discover the mapped user:

  • If the KDC is configured locally to map principals in the realm to accounts based on name [RFC4120]. In this case, the KDC MUST search the mapping for a principal with the same name.

  • If there is no default mapping rule established, the KDC MUST search Active Directory for an account which is associated with the name in the TGT.

If a matching account is found and the Application Server's service account AuthorizationDataNotRequired is set to FALSE, the KDC MUST use that account to construct a PAC and insert it into the resulting service ticket. Otherwise, the service ticket MUST be issued without a PAC.

 
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