On October 27, 2016, the Skype for Business for Mac client was released. On September 22, 2015, Skype for Business 2016 was released alongside Office 2016. On November 11, 2014, Microsoft announced that Lync would be renamed Skype for Business in 2015, also adding support for video calls with Skype users. This initially included support for text and voice communications. In May 2013, Microsoft announced that it would allow Lync users to communicate with Skype, a consumer IM platform it had acquired in 2011. In November 2010, the platform was renamed Lync. Microsoft released the successor to Office Communicator, Lync 2010, on January 25, 2011. It was followed by Office Communicator 2007 R2, released on March 19, 2009. Microsoft released Office Communicator 2007 to production on Jand launched it on October 27, 2007.

Support for Skype for Business Online ended in July 2021, and Skype for Business Server 2019 will receive extended support through October 14, 2025. In September 2017, Microsoft announced that it would phase out Skype for Business in favor of Microsoft Teams, a new cloud-based collaboration platform. In 2015, the software was rebranded from Lync to Skype for Business, co-branding it with the Microsoft-owned consumer messaging platform Skype (which had begun to integrate with Lync in 2013). It supports text, audio, and video chat, and integrates with Microsoft Office components such as Exchange and SharePoint. It is designed for use with the on-premises Skype for Business Server software, and a software as a service version offered as part of Office 365. Skype for Business (formerly Microsoft Lync and Office Communicator) was an enterprise software application for instant messaging and videotelephony developed by Microsoft as part of the Microsoft Office suite. If you have feedback for TechNet Subscriber Support, to learn more.Products.

It will assist others who has similar issue. Mark the reply as an answer if you find it is helpful. Please find more details in this official document: Then you will find it as showing in the following snapshot.In the COM Add-Ins dialog box, select the Skype Meeting Add-in for Microsoft Office 2016 option, and then click OK.On the Manage menu, select COM Add-Ins, and then click Go.If you discover the Skype Meeting control not appear on the ribbon of a meeting request in Outlook, please check to see whether you have added the Skype Meeting Add-in for Microsoft Office 2016 already

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