Microsoft to block legacy TLS 1.0/1.1 on Exchange Online starting July 2026

Microsoft will begin blocking legacy TLS 1.0 and 1.1 connections for POP3 and IMAP4 on Exchange Online starting in July 2026. This move, long anticipated, aims to enhance security and compliance by phasing out outdated protocols that are no longer considered secure. While most modern email clients already support TLS 1.2 or higher, the change could impact users relying on older devices or software that have not been updated. AI

IMPACT Minimal impact expected for most users; legacy email clients may need updates to maintain connectivity.

RANK_REASON This is a product update regarding security protocol deprecation, not a major industry shift or new release.

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• 86-DOS
• Amazon Bedrock
• Edge
• Exchange Online
• Firefox
• Google Workspace
• Microsoft
• OpenAI
• PC-DOS 1.00
• POP3
• TLS 1.0
• TLS 1.1
• TLS 1.2
• IMAP4

• policy
• product
• other

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →