These instructions will work for Outlook 2016 and 2019 and the current Office 365 version on Windows and macOS.

The below items require that you’re a member of the same organization or team.

For example, green means available, while red means currently in a meeting.

New Outlook Meeting with Teams Option Button

Fortunately, checking on it is straightforward.

First, click theFiletab on the Ribbon toolbar to go to the Backstage area.

Next, selectOptionstowards the bottom of the menu on the left.

The File menu highlighted in Microsoft Outlook.

Now selectAdd-insfrom the left side of the dialog.

You’ll see the screen shown below.

check that theMicrosoft Teams Meeting Add-inis not listed in theDisabled tool Add-inssection of the list.

The Options option highlighted in Microsoft Outlook.

If it is, selectDisabled Add-insfrom theManagedropdown and clickGo.

FindMicrosoft Teams Meeting Add-inin the list that appears, select it, clickEnable, then clickClose.

Once reactivated, you should get all the great Teams features the next time you re-start Outlook.

The add-ins options highlighted in Microsoft Outlook.

The Outlook Options Add-in Dialog with an item highlighted.

The Outlook Options Add-in Dialog with the Manage menu highlighted.

The Disable Items option in Microsoft Outlook.