MC297438 – Microsoft is making some changes to Direct Routing SIP interface.
On January 3rd 2022, to provide the best-in-class encryption to Microsoft’s customers, they will begin retiring Transport Layer Security (TLS) versions 1.0 and 1.1 and begin obligating TLS1.2 usage for the Direct Routing SIP interface.
You are receiving this message because Microsoft’s reporting indicates that your organization is still connecting using SMTP Auth client submission via smtp.office365.com with TLS1.0 or TLS1.1 to connect to Exchange Online.
Note: If your organization has already taken steps to migrate from TLS 1.0 and 1.1, you can safely disregard this message.
How this will affect your organization:
To provide the best-in-class encryption to Microsoft’s customers, they will be retiring Transport Layer Security (TLS) versions 1.0 and 1.1 beginning January 3rd 2022 and will begin forcing TLS1.2 usage for the Direct Routing SIP interface.
What you need to do to prepare:
For information on how to get ready for the enforcement of TLS 1.2, please visit: Enforce TLS 1.2 for the RMS Connector
Learn more: