Microsoft to deprecate legacy TLS in Exchange Online starting July
ID: 9a22104c-dfb1-584b-a441-6cb00b972df4
STIX ID: report--9a22104c-dfb1-584b-a441-6cb00b972df4
Feed Name: Bleeping Computer
Microsoft will deprecate TLS 1.0 and TLS 1.1 for POP3 and IMAP4 connections to Exchange Online beginning July 2026; all such connections will require TLS 1.2 or later. Most users are expected to be unaffected because modern clients already use TLS 1.2+, but administrators should update or verify custom, embedded, or legacy applications to avoid connection failures.
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