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Microsoft to deprecate legacy TLS in Exchange Online starting July
Microsoft says it will start blocking legacy TLS connections for POP and IMAP email clients in Exchange Online starting in July 2026. [...]
🤖 AI BriefingAuto-generated threat analysis
🔍Threat Overview
Microsoft will deprecate legacy TLS versions (TLS 1.0 and TLS 1.1) for POP3 and IMAP4 connections in Exchange Online starting July 2026, affecting users who rely on outdated protocols.
⚙️Technical Details
💥Impact Assessment
Severity: medium
Who Is at Risk
Users relying on POP3 and IMAP4 connections in Exchange Online
🛡️Recommended Actions
1Update email clients to support TLS 1.2 or later
2Verify that custom or embedded applications support modern TLS versions
3Check configuration of POP and IMAP clients for legacy endpoints
📦Affected Products
Product Name: Exchange OnlineAffected Software:POP3IMAP4
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