Exchange Online to drop legacy TLS for POP/IMAP from July 2026
TL;DR Summary
Microsoft says it will block legacy TLS 1.0/1.1 for POP and IMAP in Exchange Online starting July 2026, requiring TLS 1.2 or newer. Most users are unaffected since modern clients already use TLS 1.2+, but legacy devices or apps may stop connecting and must be updated. Customers should verify their POP/IMAP clients and embedded devices support TLS 1.2+ and disable legacy endpoints before the July deadline.
- Microsoft to deprecate legacy TLS in Exchange Online starting July BleepingComputer
- Microsoft to Block Legacy TLS Connections for POP and IMAP in Exchange Online Petri IT Knowledgebase
- Exchange Online: TLS 1.0/1.1 will no longer be supported for POP and IMAP starting in July 2026 BornCity
- Legacy TLS tour continues with Exchange Online blocking old versions from July 2026 theregister.com
- Microsoft will begin blocking legacy TLS connections in Exchange Online soon Neowin
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