TLS version support changes to Office 365 services

I’m sure most of the admins would have received an email from Microsoft saying,

Starting June 1, 2020, Office 365 will begin retiring TLS 1.0 and 1.1. This means that all connections to Office 365 using the protocols TLS 1.0 and TLS 1.1 will not work.

Some of my clients asked me on how to find if they even using TLS 1.0 on any of their system. So here’s how you can check from different tabs.

  1. Browse to Security and Compliance and select + View Details on ‘Outbound and Inbound mail flow’:

2. Click “Outbound and Inbound mail flow” – This shows summary of incoming and outgoing email.

3. Click “Connector Report” to know which connector is sending on what version of TLS

4. If you click on Click ‘View details pane’ then ‘Request report’ (for detailed report) directed to internal user: this will show you the actual emails and the TLS version.