我为wso2is-5.3.0配置了两因素身份验证。对于本地用户，它可以正常工作。对于来自Azure的联盟用户，从Azure成功登录后，两因素身份验证不起作用。
{org.apache.axis2.transport.mail.MailTransportSender} - MAILTO Sender started
TID: [-1234] [] [2019-06-12 19:26:00,394] ERROR {org.wso2.carbon.identity.application.authentication.framework.handler.request.impl.DefaultRequestCoordinator} - Exception in Authentication Framework
java.lang.NullPointerException
at org.wso2.carbon.utils.multitenancy.MultitenantUtils.getTenantDomain(MultitenantUtils.java:90)
at org.wso2.carbon.identity.authenticator.emailotp.EmailOTPAuthenticator.sendOTP(EmailOTPAuthenticator.java:514)
at org.wso2.carbon.identity.authenticator.emailotp.EmailOTPAuthenticator.initiateAuthenticationRequest(EmailOTPAuthenticator.java:150)
at org.wso2.carbon.identity.application.authentication.framework.AbstractApplicationAuthenticator.process(AbstractApplicationAuthenticator.java:64)
at org.wso2.carbon.identity.application.authentication.framework.handler.step.impl.DefaultStepHandler.doAuthentication(DefaultStepHandler.java:466)
at org.wso2.carbon.identity.application.authentication.framework.handler.step.impl.DefaultStepHandler.handle(DefaultStepHandler.java:233)
at org.wso2.carbon.identity.application.authentication.framework.handler.sequence.impl.DefaultStepBasedSequenceHandler.handle(DefaultStepBasedSequenceHandler.java:175)
at org.wso2.carbon.identity.application.authentication.framework.handler.request.impl.DefaultAuthenticationRequestHandler.handle(DefaultAuthenticationRequestHandler.java:127)
at org.wso2.carbon.identity.application.authentication.framework.handler.request.impl.DefaultRequestCoordinator.handle(DefaultRequestCoordinator.java:142)
at org.wso2.carbon.identity.application.authentication.framework.servlet.CommonAuthenticationServlet.doPost(CommonAuthenticationServlet.java:53)
at org.wso2.carbon.identity.application.authentication.framework.servlet.CommonAuthenticationServlet.doGet(CommonAuthenticationServlet.java:43)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:624)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
at org.eclipse.equinox.http.helper.ContextPathServletAdaptor.service(ContextPathServletAdaptor.java:37)
at org.eclipse.equinox.http.servlet.internal.ServletRegistration.service(ServletRegistration.java:61)
at org.eclipse.equinox.http.servlet.internal.ProxyServlet.processAlias(ProxyServlet.java:128)
at org.eclipse.equinox.http.servlet.internal.ProxyServlet.service(ProxyServlet.java:60)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
at org.wso2.carbon.tomcat.ext.servlet.DelegationServlet.service(DelegationServlet.java:68)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.wso2.carbon.identity.captcha.filter.CaptchaFilter.doFilter(CaptchaFilter.java:76)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.wso2.carbon.tomcat.ext.filter.CharacterSetFilter.doFilter(CharacterSetFilter.java:61)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.filters.HttpHeaderSecurityFilter.doFilter(HttpHeaderSecurityFilter.java:120)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:218)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.wso2.carbon.identity.context.rewrite.valve.TenantContextRewriteValve.invoke(TenantContextRewriteValve.java:72)
at org.wso2.carbon.identity.authz.valve.AuthorizationValve.invoke(AuthorizationValve.java:91)
at org.wso2.carbon.identity.auth.valve.AuthenticationValve.invoke(AuthenticationValve.java:60)
at org.wso2.carbon.tomcat.ext.valves.CompositeValve.continueInvocation(CompositeValve.java:99)
at org.wso2.carbon.tomcat.ext.valves.CarbonTomcatValve$1.invoke(CarbonTomcatValve.java:47)
at org.wso2.carbon.webapp.mgt.TenantLazyLoaderValve.invoke(TenantLazyLoaderValve.java:57)
at org.wso2.carbon.tomcat.ext.valves.TomcatValveContainer.invokeValves(TomcatValveContainer.java:47)
at org.wso2.carbon.tomcat.ext.valves.CompositeValve.invoke(CompositeValve.java:62)
at org.wso2.carbon.tomcat.ext.valves.CarbonStuckThreadDetectionValve.invoke(CarbonStuckThreadDetectionValve.java:159)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:958)
at org.wso2.carbon.tomcat.ext.valves.CarbonContextCreatorValve.invoke(CarbonContextCreatorValve.java:57)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:452)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1087)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1756)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1715)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)