Legacy TLS tour continues with Exchange Online blocking old versions from July 2026
ID: f13e1ce2-46e3-5dc0-bbd2-dd505e76a47d
STIX ID: report--f13e1ce2-46e3-5dc0-bbd2-dd505e76a47d
Feed Name: The Register (Security)
Microsoft will block TLS 1.0 and 1.1 for POP3 and IMAP4 connections to Exchange Online starting July 2026; support for these legacy TLS versions has been deprecated for years and Microsoft expects most modern clients (which use TLS 1.2+) to be unaffected. Organizations using opt-in legacy endpoints or old clients may experience connection failures and should verify or update their email clients to avoid disruption.
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