The Microsoft Connectivity Analyzer is testing Exchange ActiveSync. The Exchange ActiveSync test failed. Test Steps  Attempting the Autodiscover and Exchange ActiveSync test (if requested). Testing of Autodiscover for Exchange ActiveSync failed. Test Steps  Attempting each method of contacting the Autodiscover service. The Autodiscover service couldn't be contacted successfully by any method. Test Steps  Attempting to test potential Autodiscover URL https://contoso.com:443/Autodiscover/Autodiscover.xml Testing of this potential Autodiscover URL failed. Test Steps  Attempting to resolve the host name contoso.com in DNS. The host name resolved successfully. Additional Details  Testing TCP port 443 on host contoso.com to ensure it's listening and open. The port was opened successfully.  Testing the SSL certificate to make sure it's valid. The SSL certificate failed one or more certificate validation checks. Test Steps  The Microsoft Connectivity Analyzer is probing the TCP endpoint 1.1.1.1 on port 443 to detect which SSL/TLS protocols and cipher suites are enabled. We were unable to determine which SSL and TLS protocols are enabled. This is usually because we couldn't connect.  Attempting to test potential Autodiscover URL https://autodiscover.contoso.com:443/Autodiscover/Autodiscover.xml Testing of this potential Autodiscover URL failed. Test Steps  Attempting to resolve the host name autodiscover.contoso.com in DNS. The host name resolved successfully. Additional Details  Testing TCP port 443 on host autodiscover.contoso.com to ensure it's listening and open. The port was opened successfully.  Testing the SSL certificate to make sure it's valid. The SSL certificate failed one or more certificate validation checks. Test Steps  The Microsoft Connectivity Analyzer is probing the TCP endpoint 1.1.1.1 on port 443 to detect which SSL/TLS protocols and cipher suites are enabled. We were unable to determine which SSL and TLS protocols are enabled. This is usually because we couldn't connect.  Attempting to contact the Autodiscover service using the HTTP redirect method. The attempt to contact Autodiscover using the HTTP Redirect method failed. Test Steps  Attempting to resolve the host name autodiscover.contoso.com in DNS. The host name resolved successfully. Additional Details  Testing TCP port 80 on host autodiscover.contoso.com to ensure it's listening and open. The port was opened successfully.  The Microsoft Connectivity Analyzer is checking the host autodiscover.contoso.com for an HTTP redirect to the Autodiscover service. The Microsoft Connectivity Analyzer failed to get an HTTP redirect response for Autodiscover. Additional Details An HTTP 403 forbidden response was received. The response appears to have come from Unknown. Body of the response: HTTP Response Headers: X-FEServer: EXCH19A Content-Length: 0 Date: Thu, 01 Dec 2022 17:48:03 GMT Server: Microsoft-IIS/10.0 X-Powered-By: ASP.NET  Attempting to contact the Autodiscover service using the DNS SRV redirect method. The Microsoft Connectivity Analyzer failed to contact the Autodiscover service using the DNS SRV redirect method. Test Steps  Attempting to locate SRV record _autodiscover._tcp.contoso.com in DNS. The Autodiscover SRV record was successfully retrieved from DNS. Additional Details  Attempting to test potential Autodiscover URL https://mail.contoso.com:443/Autodiscover/Autodiscover.xml Testing of this potential Autodiscover URL failed. Test Steps  Attempting to resolve the host name mail.contoso.com in DNS. The host name resolved successfully. Additional Details  Testing TCP port 443 on host mail.contoso.com to ensure it's listening and open. The port was opened successfully.  Testing the SSL certificate to make sure it's valid. The certificate passed all validation requirements. Test Steps  The Microsoft Connectivity Analyzer is probing the TCP endpoint 2.2.2.2 on port 443 to detect which SSL/TLS protocols and cipher suites are enabled. We were able to detect the enabled protocols and cipher suites. Additional Details  Checking that your server supports modern TLS protocols and cipher suites. Your server supports modern TLS protocols and cipher suites; it should be compatible with Microsoft 365 services.  The Microsoft Connectivity Analyzer is attempting to obtain the SSL certificate from remote server mail.contoso.com on port 443. The Microsoft Connectivity Analyzer successfully obtained the remote SSL certificate. Additional Details  Validating the certificate name. The certificate name was validated successfully. Additional Details  Certificate trust is being validated. The certificate is trusted and all certificates are present in the chain. Test Steps  The Microsoft Connectivity Analyzer is attempting to build certificate chains for certificate CN=*.contoso.com. One or more certificate chains were constructed successfully. Additional Details  Analyzing the certificate chains for compatibility problems with versions of Windows. The test passed with some warnings encountered. Please expand the additional details. Additional Details  Testing the certificate date to confirm the certificate is valid. Date validation passed. The certificate hasn't expired. Additional Details  Attempting to send an Autodiscover POST request to potential Autodiscover URLs. Autodiscover settings weren't obtained when the Autodiscover POST request was sent. Test Steps  The Microsoft Connectivity Analyzer is attempting to retrieve an XML Autodiscover response from URL https://mail.contoso.com:443/Autodiscover/Autodiscover.xml for user test.user@contoso.com. The Microsoft Connectivity Analyzer failed to obtain an Autodiscover XML response. Additional Details An error message was returned from the Autodiscover service XML response: en:us test.user@contoso.com 2 Cannot find the e-mail address. HTTP Response Headers: request-id: d6394b60-bd5b-4cde-9ecc-9f325c108589 X-CalculatedBETarget: EXCH19B.contoso.com X-DiagInfo: EXCH19B X-BEServer: EXCH19B Persistent-Auth: true X-FEServer: EXCH19A Content-Length: 563 Cache-Control: private Content-Type: text/xml; charset=utf-8 Date: Thu, 01 Dec 2022 17:48:07 GMT Set-Cookie: X-BackEndCookie=S-1-5-21-75806145-3628390858-1216286386-4637=u56Lnp2ejJqBm5rJys7LxpvSzZ6dnNLLycjG0sbGzczSyMeczc/Lnc/Nzc+dgYHNz83N0s7N0szOq87IxcvHxc/HgYWNlpSb0YieiNGPk4HP; expires=Sat, 31-Dec-2022 17:48:08 GMT; path=/Autodiscover; secure; HttpOnly Server: Microsoft-IIS/10.0 X-AspNet-Version: 4.0.30319 X-Powered-By: ASP.NET