MC299922: Direct Routing will stop processing SIP requests which have ‘Replaces’ headers

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.

Updated December 31, 2021: We have updated the post to ensure it shows for all tenants as intended. No changes have been made to the content below. Thank you for your patience.

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

When will this happen

We will begin this change in early April 2022 (previously early January) and expect to complete mid-April 2022 (previously mid-January).

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.

Learn more

Message ID: MC299922
Published: 24 November 2021
Updated: 14 January 2022
#AdminImpact #Teams #UpdatedMessage
Plan For Change