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Preparing for TLS 1.0/1.1 Deprecation - O365 Outlook

Brass Contributor

I just received a message from Office 365: Prevent/Fix: Your organization is still using TLS1.0 or TLS1.1 to connect to Exchange Online


When I ran the TLS Deprecation report, most of the clients that were using the old version of TLS were Outlook 2016. Why is this the case and how can I force Outlook to use TLS 1.2?

2 Replies

I'm keen to understand this as well. 

The SMTP Auth clients TLS deprecation report sais that 100% of messages were sent with TLS 1.2. This doesn't make sense to me.