Problem
My outlook is not allowing me to add an MS Teams Link to my calendar invites.
Solution
Follow these steps:
In Outlook, choose File and then Options.
Select the Add-ins tab of Outlook Options dialog box.
Confirm that Microsoft Teams Meeting Add-in for Microsoft Office is listed in the Active Application Add-ins list
If the Teams Meeting Add-in is listed in the Disabled Application Add-ins list, select COM Add-ins in Manage and then select Go…
Set the checkbox next to Microsoft Teams Meeting Add-in for Microsoft Office.
Choose OK on all dialog boxes and restart Outlook.