Simple definition
A trust relationship allowing an identity managed in one system to access another service.
Technical definition
The federation uses standards such as SAML or OpenID Connect to transfer proof of identity between security areas.
What is it used for ?
Avoid recreating a separate password in each application.
Practical example
A company may use Entra ID to authenticate software users SaaS third.
Common issues
- Trust relationship misconfigured
- Certificate expired
- Incompatible attributes
Related terms
Key takeaway: This entry explains the general operation of the term. Exact settings may vary depending on software, vendors and environments.