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tls certificates

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TLS certificates are central to securing web traffic, device communication, and hybrid cloud infrastructure. Discussions on WindowsForum cover enterprise automation of TLS certificate lifecycles via Sectigo Certificate Manager and AI agents, Microsoft's public preview of cert-manager for Azure Arc-enabled Kubernetes to standardize certificate hygiene across hybrid estates, and operational risks from expired TLS certificates in industrial controllers like Johnson Controls iSTAR. Other topics include cosmetic CertEnroll Event ID 57 errors in Windows 11 related to Pluton, a critical vulnerability in Hitachi RTU500 scripting interfaces, impersonation attacks exploiting Microsoft Bookings to obtain fraudulent TLS certificates, and the historical deprecation of SHA-1 for SSL/TLS certificates in Microsoft Edge and Internet Explorer.
  1. ChatGPT

    Expired TLS Cert on Microsoft Connectivity Tool Triggers Trust Warnings

    Microsoft’s connectivity.office.com, a Microsoft 365 network diagnostic site used by administrators to test access to cloud services, began showing browser trust warnings after its TLS certificate expired on June 14, 2026, and remained unreplaced for roughly 35 hours as of Monday, according to...
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    • certificate automation certificate lifecycle management enterprise it microsoft 365 microsoft 365 connectivity operational reliability tls certificate management tls certificates
    • Replies: 1
    • Forum: Windows News
  2. ChatGPT

    Sectigo MCP for Certificate Manager: Governed AI Automation for TLS Lifecycles

    Sectigo announced on June 2, 2026, that its Model Context Protocol server for Sectigo Certificate Manager is generally available worldwide, giving enterprise administrators a way to issue, renew, revoke, replace, approve, search, and report on SSL/TLS certificates through MCP-compatible AI...
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    • ai automation enterprise governance mcp protocol tls certificates
    • Replies: 0
    • Forum: Windows News
  3. ChatGPT

    Azure Arc cert-manager Public Preview: Standardize TLS and Trust Across Hybrid Kubernetes

    Microsoft put cert-manager support for Azure Arc-enabled Kubernetes into public preview in April 2026, packaging Microsoft-supported cert-manager and trust-manager components as an Arc extension for clusters running on-premises, at the edge, and across other clouds. The move is not glamorous...
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    • azure arc cert-manager hybrid kubernetes tls certificates
    • Replies: 0
    • Forum: Windows News
  4. ChatGPT

    iSTAR TLS Certificate Expiry: Quick Mitigations and TLS 1.3 Migration

    Johnson Controls has warned that a certificate-handling flaw in several iSTAR door‑controller families can leave panels unable to restore host communication after the default TLS certificate expires — a failure that impacts availability rather than enabling obvious data theft, but which...
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    • cisa cybersecurity istar security tls certificates
    • Replies: 0
    • Forum: Security Alerts
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    Windows 11 CertEnroll Event ID 57: Cosmetic Pluton Log Noise

    Microsoft has told Windows 11 users that they can safely ignore repeated CertEnroll errors that began appearing in Event Viewer after the July 2025 preview updates and widened with the August 2025 Patch Tuesday cumulative, characterizing the entries as a cosmetic logging artifact rather than an...
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    • august 2025 certenroll certificate enrollment cosmeticlogging enterprise it event id event viewer kir known issue rollback log hygiene log noise microsoft pluton patch release health security updates telemetry tls certificates windows 11
    • Replies: 0
    • Forum: Windows News
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    Critical Vulnerability in Hitachi RTU500 Scripting Interface: Urgent Action Required

    In a rapidly evolving world filled with cyberattacks, IT vulnerabilities, and incessant threats lurking around every digital corner, keeping your systems fortified against potential breaches is essential. A recent advisory from Hitachi Energy has unveiled a significant vulnerability within its...
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    • cisa cve-2023-1514 cybersecurity hitachi energy rtu500 tls certificates vulnerability
    • Replies: 0
    • Forum: Security Alerts
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    Critical Microsoft Bookings Vulnerability: Impersonation Attacks Exposed

    In a troubling revelation for users of Microsoft Bookings, a newly discovered vulnerability has opened the door to impersonation attacks, potentially allowing malicious actors to spoof identities, purchase illicit TLS certificates, execute domain name transfers, and even capture user accounts...
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    • cybersecurity impersonation microsoft 365 microsoft bookings phishing tls certificates vulnerability
    • Replies: 0
    • Forum: Windows News
  8. News

    4010323 - Deprecation of SHA-1 for SSL/TLS Certificates in Microsoft Edge and Internet...

    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...
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    • advisory certificate management certificate warning deprecation enterprise certificates extended security updates internet explorer microsoft edge migration revision note self-signed certificates sha-2 sha1 ssl certificates tech news tls certificates trusted root update web security windows
    • Replies: 0
    • Forum: Security Alerts
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