TLS

Transport Layer Security

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TLS Web Services Support On Exchange Server 2019 CU14 vs CU15

Posted on by Rhoderick Milne [MSFT]
Exchange Server 2019 CU15 TLS Scan Results

Transport Layer Security (TLS) has always been a critical component of securing communications in Microsoft Exchange Server, ensuring confidentiality and integrity of email traffic both internally and externally. With Exchange Server 2019, Microsoft has steadily evolved TLS support to align with modern security standards and deprecate older, weaker protocols. A notable shift came between Cumulativ… Read the rest “TLS Web Services Support On Exchange Server 2019 CU14 vs CU15”

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Joys of Server 2012 R2 TLS Defaults in June 2022

Posted on by Rhoderick Milne [MSFT]
Server 2012 R2 SSLLabs Report

Windows Server 2012 R2 was a great platform and was very widly adopted.  Unlike it’s less popular step-sister, Server 2012.  At least the R2 product had a start button, rather than the start pixel….

However, it really does show its age when viewed under a modern security lens.  Unsurprisingly, things have changed from a security perspective over the last decade. Not all of the Server 2012 R2 defaul… Read the rest “Joys of Server 2012 R2 TLS Defaults in June 2022”

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SSL Labs Scan Outlook.Office365.com–June 2022

Posted on by Rhoderick Milne [MSFT]
SSLLabs Scan Outlook.Office365.com June 2022

This post is a scan of Outlook.office365.com taken with the SSLLabs.com scan tool which analyses the TLS configuration of the server.

 

 

Deprecating support for 3DES

Since October 31, 2018, Office 365 no longer supports the use of 3DES cipher suites for communication to Office 365. More specifically, Office 365 no longer supports the TLS_RSA_WITH_3DES_EDE_CBC_SHA cipher suite. Since Februar… Read the rest “SSL Labs Scan Outlook.Office365.com–June 2022”

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TLS Musings

Posted on by Rhoderick Milne [MSFT]
TLS Options In Browser

Transport Layer Security (TLS) and Secure Sockets Layer (SSL) are protocols that provide secure communications.  Today several versions of these protocols exist, and not all of them are considered secure by Microsoft or other security companies.

Schannel is a Security Support Provider (SSP) that implements the SSL, TLS and Datagram Transport Layer Security (DTLS) Internet standard authentication pro… Read the rest “TLS Musings”