https://www.jetbrains.com/help/youtrack/server/register-service-provider.html
Register a Service Provider | YouTrack Server Documentation
Learn how to register a service provider in YouTrack after configuring SAML so the external service can use YouTrack as its identity provider.
register a serviceprovideryoutrackserverdocumentation
https://learn.microsoft.com/en-us/sql/database-engine/configure-windows/register-a-service-principal-name-for-kerberos-connections?view=sql-server-ver17
Register a Service Principal Name for Kerberos Connections - SQL Server | Microsoft Learn
Find out how to register a Service Principal Name (SPN) with Active Directory. This registration is required for using Kerberos authentication with SQL Server.
register a service