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    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
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