The majority of the service now connects through TLS 1.2+ to provide best-in-class encryption. A very small number of Intune customers received MC305713 recently. In that message, we describe the steps to take – below – to update your connection to TLS 1.2 for the Exchange Connector.
To ensure our service is more secure by default, we are continuing with the final steps to move fully to TLS 1.2+. If you have not yet updated your on-premises Intune Exchange connector to TLS 1.2, your connectivity to Intune and email access might be impacted.
How this will affect your organization
If you are still using an on-premises Intune Exchange connector with TLS 1.0, you will see the recent message center post MC305713 - Prevent/Fix: Update your Exchange Connector to support TLS 1.2 detailing this action item. Note that the Exchange connector overall is deprecated. However, starting on or soon after January 15th, we will roll out changes to remove connectivity below TLS 1.2. Since the Exchange connector works with Conditional Access, if you don’t update the connector, your users may not be appropriately blocked or allowed access to emailbased on the conditions you’ve defined.