Microsoft Skype for Business Server 2019: April 2022

 Microsoft released Skype for Business Server 2019, v7.0.2046.396

See description in KB4470124 and download from here

Microsoft Skype for Business Server 2015: February 2022

Microsoft released Skype for Business Server 2015, v6.0.9319.623
See description in KB3061064 and download from here

MC307310 - sip-all FQDNs will not be supported starting March 1st, 2022

Microsoft Message Center

Message Summary

 

We're making some changes to Teams Direct Routing

On March 1, 2022, we will be removing support for sip-all.pstnhub.microsoft.com and sip-all.pstnhub.gov.teams.microsoft.us FQDNs from Direct Routing configuration.

Note: If you aren't using Session Border Controllers you can safely disregard this message.

How this will affect your organization:

When this change is implemented, if no actions taken and sip-all FQDN is used, users will no longer be able to make or receive calls via Direct Routing.

What you need to do to prepare:

Customers will need to use the recommended subnets (52.112.0.0/14 and 52.120.0.0/14) for any classification or ACL rules and discontinue using the sip-all FQDN when configuring Session Border Controls for the Direct Routing.

Learn more:

• Plan Direct Routing

 

Microsoft Skype for Business Server 2019: December 2021

Microsoft released Skype for Business Server 2019, v7.0.2046.385
See description in KB4470124 and download from here

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.

MC299923 - Trusted certificate authorities for Direct Routing SIP interface are changing

Microsoft Message Center

Message Summary

We're making some changes to the Direct Routing SIP interface.

Starting on February 1, 2022, the Direct Routing SIP interface will only trust certificates that are signed by Certificate Authorities (CAs) that are part of the Microsoft Trusted Root Certificate Program.

How this will affect your organization:

If your SBC certificate is not signed by a CA, you service may be impacted when this change takes effect. Unsupported certificates will not be accepted and you will lose PSTN connectivity via Direct Routing.

Note: Make sure that your SBC certificate is signed by a CA that is part of the program and that the Extended Key Usage (EKU) extension of your certificate includes Server Authentication.

Learn more:

• Program Requirements - Microsoft Trusted Root Program
• Included CA Certificate List

Updates for Lync Server 2013: September 2021

Microsoft released Lync Server 2013, v5.0.8308.1149

See description in KB5006895 and download from here