MC1293480: Exchange Online Retires Legacy TLS for POP and IMAP Connections, Requires TLS 1.2 or Later
Posted inExchange Online

MC1293480: Exchange Online Retires Legacy TLS for POP and IMAP Connections, Requires TLS 1.2 or Later

(Updated) Exchange Online: Retirement of legacy TLS versions for POP and IMAP connections Message ID: MC1293480 (Updated) Updated July 7, 2026: We have updated the timeline. Thank you for your patience. [Introduction]We are retiring support for legacy Transport Layer Security (TLS)…
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Exchange Online: Retirement of legacy TLS versions for POP and IMAP connections [MC1293480]
Posted inExchange Online

Exchange Online: Retirement of legacy TLS versions for POP and IMAP connections [MC1293480]

Message ID: MC1293480 [Introduction]We are retiring support for legacy Transport Layer Security (TLS) versions for POP3 and IMAP4 connections to Exchange Online. This change improves security and aligns with current industry standards. TLS 1.0 and TLS 1.1 are no longer…
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