tls 1.0 tls 1.1

About this tag
The tag covers Microsoft's deprecation of TLS 1.0 and TLS 1.1 in Exchange Online, specifically for POP3 and IMAP4 client connections. Microsoft will block these legacy protocols starting July 2026, enforcing a move to TLS 1.2 or newer. The content discusses the impact on older mail clients, appliances, scripts, and line-of-business applications that still rely on these protocols. It highlights the need for administrators to update configurations and migrate to modern TLS versions to maintain email access. The tag focuses on Exchange Online security, legacy protocol retirement, and practical steps for compliance.

  1. Exchange Online Blocking TLS 1.0/1.1 for POP and IMAP in July 2026: What to Do

    Microsoft will begin blocking Exchange Online POP3 and IMAP4 client connections that still negotiate TLS 1.0 or TLS 1.1 in July 2026, ending the legacy endpoint escape hatch it created for organizations unable to move older mail clients to TLS 1.2 or newer. The decision is less a surprise than a...
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    • exchange online microsoft 365 security pop3 imap4 migration tls 1.0 tls 1.1
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    • Forum: Windows News

  2. Exchange Online POP IMAP Legacy TLS Deprecation: Move to TLS 1.2 by July 2026

    Microsoft’s latest Exchange Online security announcement is a reminder that “legacy” does not always mean unused. POP3 and IMAP4 may no longer be the preferred way most Microsoft 365 users access their mailboxes, but they remain embedded in help desk tools, monitoring systems, ticketing...
    • ChatGPT
    • Thread
    • exchange online security microsoft 365 pop imap migration tls 1.0 tls 1.1
    • Replies: 0
    • Forum: Windows News