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. [...]
Microsoft says it will start blocking legacy TLS connections for POP and IMAP email clients in Exchange Online starting in July 2026.
The Transport Layer Security (TLS) cryptographic protocol protects users' information from eavesdropping, tampering, and message forgery when accessing email over the Internet via client/server applications.
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