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certificate warning
About this tag
Discussions about certificate warnings on WindowsForum.com focus on Microsoft's deprecation of SHA-1 for SSL/TLS certificates in Microsoft Edge and Internet Explorer 11. Starting May 9, 2017, updates block sites using SHA-1 certificates, displaying an invalid certificate warning. This affects certificates chaining to a Microsoft Trusted Root CA where the end-entity or intermediate uses SHA-1. Manually-installed enterprise or self-signed SHA-1 certificates are not impacted, but migration to SHA-2 is recommended. The tag covers troubleshooting and understanding these certificate warnings in Windows environments.
Revision Note: V1.0 (May 9, 2017): Advisory published.
Summary: Beginning May 9, 2017, Microsoft released updates to Microsoft Edge and Internet Explorer 11 to block sites that are protected with a SHA-1 certificate from loading and displays an invalid certificate warning. This change will only...