MC299922 - Direct Routing will stop processing SIP requests which have 'Replaces' headers

Microsoft Message Center

Message Summary

We'll be making some changes to Teams Direct Routing.

Note: Starting on January 3, 2022, Direct Routing will stop processing SIP requests which have Replaces headers.

When will this happen:

We will begin this change in early January '22 and expect to complete mid-January '22.

How this will affect your organization:

When this change is implemented, Direct Routing will reject SIP requests that have Replaces headers defined.

What you need to do to prepare:

Please check your Session Border Controller configuration and be sure that you are not using Replaces headers in SIP requests.