User mapping is the ability to establish a relationship between a user identity at one business and a user identity at another business. This relationship is established by mapping remote users at an asserting party to local users at the relying party.
The types of mapping are as follows:
One-to-one mapping is often referred to as account linking, as it links an account at an asserting party site to an account at a relying party, as shown in the following illustration:
N-to-one mapping allows several user records at a asserting party to be mapped to one user record or profile at the relying party. An administrator at the relying party can use this type of mapping to define access control for a group of remote users, without having to maintain a record for each remote user.
The following illustration shows n-to-one mapping:
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