- In Outlook, select File > Options.
- In the Outlook Options dialog box, select the Add-ins tab.
- Check whether Microsoft Teams Meeting Add-in for Microsoft Office is listed in the Active Application Add-ins list.
- If the add-in is not listed in the list of active applications, and you see the Teams Meeting Add-in listed in the Disabled

- Application Add-ins list, select Manage > COM Add-ins and then select Go…
- Select the checkbox next to Microsoft Teams Meeting Add-in for Microsoft Office.
- Select OK on all the dialog boxes that are open and restart Outlook.