File 'oauth-provider.properties' has been extended by a new property 'com.openexchange.oauth.provider.isAuthorizationSe rver', which specifies, whether the internal OAuth 2.0 provider shall also act as authorization server. Default is 'true'. The default behavior of the feature is not changed. When setting the property to 'false', a custom implementation of 'com.openexchange.oauth.provider.authorizationserv er.spi.OAuthAuthorizationService' must be provided.