![]() If the order doesn't reflect the change, check if the SSL Cipher Suite Order Group Policy setting configures the default TLS cipher suite order.įor more information, see What are the current cipher suites supported by Azure Front Door?. To add cipher suites, either deploy a group policy or use local group policy as described in Configuring TLS Cipher Suite Order by using Group Policy.Īfter you run Enable-TlsCipherSuite, you can verify the order of the cipher suites by running Get-TlsCipherSuite. Resolution Windows 10Įven after you upgrade to TLS 1.2, it's important to make sure that the cipher suites settings match Azure Front Door requirements, because Microsoft 365 and Azure Front Door provide slightly different support for cipher suites.įor TLS 1.2, the following cipher suites are supported by Azure Front Door: OS doesn't have TLS 1.2 enabled SymptomĪuthentication issues occur in older operating systems and browsers that don’t have TLS 1.2 enabled, or in specific network configurations and proxy settings that force legacy TLS protocols. NET Framework to enable TLS 1.2+, see Configure for strong cryptography. Resolutionįor more information about how to configure. The Business Data Connectivity Metadata Store is currently unavailable. : An existing connection was forcibly closed by the remote host. ![]() ![]() System.IO.IOException: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. : The underlying connection was closed: An unexpected error occurred on a send. > : The remote server returned an error: (401) Unauthorized.Īt () You experience one or more of the following errors when you access SharePoint: If you haven't taken steps to prepare for this change, your connectivity to Microsoft 365 might be affected.NET Framework not configured for TLS 1.2 Symptom Support for TLS 1.2+ will continue to be added to all Microsoft 365 environments for the next several months. If all the steps have been completed correctly, you will no longer see the warning page on Firefox.As previously communicated in the Microsoft 365 Admin Center (for example, communication MC240160 in February 2021), we're moving all online services to Transport Layer Security (TLS) 1.2+. The screenshot below shows that the certificate has been correctly installed in the Firefox cert store. ![]() If the intermediate certificate is not installed into Firefox’s Certificate manager, or has not been installed in the correct store on the webserver or reverse proxy, then the client browser/system will not trust that connection, as it cannot complete the certificate chain. Citrix Netscaler, Sophos UTM etc., the intermediate certificate should also be installed on those systems as well. If the web server is being published to the internet via a reverse proxy, e.g. The customer simply needed to install the intermediate certificate on their web server using Certificates MMC, and add it to the Local Computer store in the Intermediate Certification Authorities folder. We confirmed the issue using digicert’s certificate tool ( ). Firefox is unable to complete the chain without the intermediate certificate. ![]() This means that Chrome, IE, and Edge have the certificates needed to complete the chain of trust from your certificate back to the root certificate, even if the intermediate certificate is not present. The latter use the Windows certificate store, while Firefox uses its own. Firefox uses a different certificate store than Chrome, IE, and Edge. So, what gives?įirefox displays the aforementioned error if the server does not send a required intermediate certificate. We reproduced the condition using Firefox, but the same could not be reproduced in Chrome, IE, or Edge. One of our password reset customers experienced the dreaded “Untrusted connection” error when browsing to the password reset web on their Android device. Even if the SSL certificate is installed correctly, you are not necessarily in the clear. There are many reasons why you may see an SSL error, some of which will vary by browser. ![]()
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