1. A method comprising: receiving, at a computing device, a security token identifier and a request to access one or more resources of the computing device, the security token identifier comprising information that identifies a security token; sending, from the computing device to a server computing system, a request to identify domains having a trust relationship with a domain associated with the computing device; receiving, at the computing device from the server computing system, a response to the request to identify domains having a trust relationship with the domain associated with the computing device, the response comprising information that identifies one or more domains each having a trust relationship with the domain associated with the computing device; determining that an entry in a first data store matches the security token identifier, the first data store associated with a first domain of the one or more domains each having a trust relationship with the domain associated with the computing device; in response to the determining that an entry in the first data store matches the security token identifier, updating a local data store at the computing device such that, in the local data store, the security token identifier is associated with first domain information that identifies the first domain; and granting the requested access to one or more resources of the computing device.