Hi @Ben ,
Do you have any operations before this issue occurred?
Do you mean you cannot find Skype Meeting add-in option in outlook client?
If you do not see the Skype Meeting Add-in for Microsoft Office 2016 entry in the COM Add-Ins dialog box in outlook, the add-in may not be correctly configured in the HKEY_LOCAL_MACHINE hive of the registry. To resolve this issue, examine the applicable registry subkey for the Skype Meeting Add-in for your installation of Microsoft Office 2016. For more details about steps, you can refer to:
If the response is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.