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highExchangeExchange Onlinedeprecationm365_message_center · Apr 27, 2026
(Updated) Exchange Online: Retirement of legacy TLS versions for POP and IMAP connections
Exchange Online is retiring support for legacy TLS versions in POP3 and IMAP4 connections to improve security and align with industry standards. This change affects email clients that rely on older TLS protocols.
“Services: Exchange Online. <p>Updated July 7, 2026: We have updated the timeline. Thank you for your patience. </p><p><b>[Introduction]</b></p><p>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 …”
View original article →Security
cloud_securityendpoint_security
Audience
adminsecurity_engineer
Environment
cloud
Ontology Topics
AZ-500
Classification confidence: 95%
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