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6 Appendix A: Product Behavior

The information in this specification is applicable to the following Microsoft products or supplemental software. References to product versions include updates to those products.

  • Microsoft Office Communicator 2007

  • Microsoft Office Communications Server 2007

  • Microsoft Office Communications Server 2007 R2

  • Microsoft Office Communicator 2007 R2

  • Microsoft Lync 2010

  • Microsoft Lync Server 2010

  • Microsoft Lync Client 2013/Skype for Business

  • Microsoft Lync Server 2013

  • Microsoft Skype for Business 2016

  • Microsoft Skype for Business Server 2015

  • Windows 10 v1511 operating system

  • Windows Server 2016 operating system

  • Windows Server 2019 operating system

  • Windows Server 2022 operating system

  • Microsoft Skype for Business 2019

  • Microsoft Skype for Business Server 2019

  • Microsoft Skype for Business 2021

  • Windows 11 operating system

  • Windows Server 2025 operating system

  • Microsoft Skype for Business LTSC 2024

  • Microsoft Skype for Business Server Subscription Edition

Exceptions, if any, are noted in this section. If an update version, service pack or Knowledge Base (KB) number appears with a product name, the behavior changed in that update. The new behavior also applies to subsequent updates unless otherwise specified. If a product edition appears with the product version, behavior is different in that product edition.

Unless otherwise specified, any statement of optional behavior in this specification that is prescribed using the terms "SHOULD" or "SHOULD NOT" implies product behavior in accordance with the SHOULD or SHOULD NOT prescription. Unless otherwise specified, the term "MAY" implies that the product does not follow the prescription.

<1> Section 2.1:  Office Communicator 2007 R2, Office Communications Server 2007 R2, Lync 2010, Lync Server 2010: IPv6 is not supported.

<2> Section 2.2.2:  Skype for Business 2016, Skype for Business Server 2015, Windows 10 v1511, Windows 10 v1511 Enterprise operating system, Windows Server 2016: [RFC5389] is applicable only to these versions and higher.

<3> Section 2.2.2.2:  Office Communicator 2007, Office Communications Server 2007: The IMPLEMENTATION-VERSION attribute is not supported.

<4> Section 2.2.2.2:  Office Communicator 2007 R2, Office Communications Server 2007 R2: This value is set to 0x00000001. Lync 2010, Lync Server 2010, Lync Client 2013/Skype for Business, Lync Server 2013: This value is set to 0x00000002.

<5> Section 2.2.2.3:  This attribute does not apply to Skype for Business 2016 and Skype for Business Server 2015 and earlier.

<6> Section 2.2.2.4:  This attribute does not apply to Skype for Business 2016 and Skype for Business Server 2015 and earlier.

<7> Section 3.1.4.4.1:  Office Communicator 2007, Office Communications Server 2007, Office Communications Server 2007 R2, Office Communicator 2007 R2, Lync 2010, Lync Server 2010, Lync Client 2013/Skype for Business, Lync Server 2013, Skype for Business 2016, Skype for Business Server 2015, Skype for Business 2019, Skype for Business Server 2019, Windows 10 v1511: ICE Lite handling described in this section applies only to these versions.

<8> Section 3.1.4.8.1:  Office Communicator 2007 R2, Office Communications Server 2007 R2, Lync 2010, Lync Server 2010: IPv6 is not supported.

<9> Section 3.1.4.8.1:  Office Communicator 2007 R2, Office Communications Server 2007 R2, Lync 2010, Lync Server 2010: A maximum of 20 candidates is supported.

<10> Section 3.1.4.8.1.1:  Office Communicator 2007 R2, Office Communications Server 2007 R2, Lync 2010, Lync Server 2010: IPv6 is not supported.

<11> Section 3.1.4.8.2:  Office Communications Server 2007 R2, Office Communicator 2007 R2: This behavior is not supported. Lync Server 2013, Lync Client 2013/Skype for Business: This behavior is not supported for IPv6 candidate pairs.

<12> Section 3.1.4.8.2:  Office Communications Server 2007 R2, Office Communicator 2007 R2: This behavior is not supported.

<13> Section 3.1.4.8.2:  Office Communications Server 2007 R2, Office Communicator 2007 R2: This behavior is not supported.

<14> Section 3.1.4.8.2.1:  Office Communicator 2007 R2, Office Communications Server 2007 R2, Lync 2010, Lync Server 2010: A maximum of 40 candidate pairs is supported.

<15> Section 3.1.5.1:  Windows 10 v1511, Windows 10 v1511 Enterprise, Windows Server 2016: Applicable only to these versions and higher.

<16> Section 3.1.5.3.1:  Office Communicator 2007, Office Communications Server 2007, Office Communications Server 2007 R2, Office Communicator 2007 R2, Lync 2010, Lync Server 2010, Lync Client 2013/Skype for Business, Lync Server 2013: Applicable only to these versions.

<17> Section 3.1.6.3:  Office Communicator 2007 R2, Office Communications Server 2007 R2: This behavior is not supported.

<18> Section 3.1.6.5:  Skype for Business 2016, Skype for Business Server 2015, Windows 10 v1511, Windows 10 v1511 Enterprise, Windows Server 2016: Applicable only to these versions and higher.