Story perspectives
Microsoft to Disable TLS 1.0/1.1 on Exchange Online July
4/30/2026
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Story summary
- Microsoft will block TLS 1.0 and TLS 1.1 POP3/IMAP4 connections to Exchange Online in July 2026.
- Support for those protocols ended in 2020 and was deprecated in 2021.
- Microsoft announced in 2023 a disablement plan with an opt-in endpoint for legacy use.
- Legacy devices may lose connectivity because they cannot use TLS 1.2, requiring customers to verify settings.
