Skype Meeting control is not displayed on Outlook
Summary
After you install the Skype Meeting Add-in for Microsoft Office in Microsoft Outlook, the Skype Meeting control may not appear on the ribbon of a meeting request in Outlook.
Resolution
To resolve this issue, you can manually enable the Skype Meeting Add-in for Microsoft Office 2016 in Outlook. To do this, follow these steps:
Start Outlook.
1. On the File menu, click Options.
2. In the navigation pane, click Add-Ins.
3. On the Manage menu, select COM Add-Ins, and then click Go.
4. In the COM Add-Ins dialog box, select the Skype Meeting Add-in for Microsoft Office 2016 option, and then click OK.