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

Updated April 08, 2022: We have updated the post to ensure it shows for all tenants as well as updated the dates. Thank you for your patience.

Updated April 08, 2022: We have updated the post to ensure it shows for all tenants as well as updated the dates. Thank you for your patience.

Updated March 15, 2022: Microsoft 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.

Microsoft will be making some changes to Teams Direct Routing.

Note: Starting on May 10, 2022 (previously April 5, 2022), Direct Routing will stop processing SIP requests which have Replaces headers.

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

When will this happen

We will begin rolling this out in mid-December and expect to complete by late December.

How this will affect your organization

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

When this change is implemented, Direct Routing will reject SIP requests that have Replaces headers defined. This will impact requests coming from Session Border Controller to Direct Routing. SIP requests that have Replaces headers coming from Direct Routing To the Session Border Controller will remain as is.

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: 12 April 2022

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