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Both the interfaces can use various authentication methods, such as a local database, or Active Directory/LDAP. It is also possible to use external authentication (HTTPBasicAuth) in which case OTRS does not take responsibility for authentication any more, but instead relies on an Apache environment headers to variable to provide a usernamethe username. The is the way forward if you want to use SAML or federated authentication, but there are some issues with.
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