Microsoft will block TLS 1.0 and 1.1 in Exchange Online by July 2026, requiring organizations to upgrade to TLS 1.2 or higher.

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 ...

Transport-Level Security (TLS) is one of the most widely used cryptography protocols. It is used to encrypt data in transit between web browsers and web servers, as well as countless other connections ...

Outlook is heavily used in both enterprise and personal environments so it's crucial that Microsoft keeps it updated according to current security and technology standards. We already know that the ...

Microsoft announced plans to deprecate legacy Transport Layer Security (TLS) versions and older endpoints for POP3 and IMAP4 connections in Exchange Online, as part of ongoing eff ...

Microsoft will block POP3 and IMAP4 connections using legacy TLS 1.0 or 1.1 in Exchange Online from July 2026, ending its ...