Why can’t I see the “Teams” button in outlook?

In order for the ‘Teams’ add-in to be shown in Outlook you should start Teams before starting Outlook.

1. Close both ‘Teams’ and ‘Outlook’.
2. Restart ‘Teams’ and wait until everything has started up and chat/messages/teams are displayed.
3. Start Outlook.

If that didn't resolve the issue:

1. Logout the VDI
2. Log back in.
3. Start ‘Teams’ and wait until everything has started up and chat/messages/teams are displayed.
4. Start Outlook.

If the Teams button still fails to show, check the ‘Teams Add-In’ is enabled in Outlook.

How do I enable the Teams Add-In within Outlook?

1. In Outlook, click ‘File’.
2. Click ‘Options’.
3. Click ‘Add-Ins’.
4. Look for and tick ‘Microsoft Teams Meeting Add-In for Microsoft Office’. (If it is not listed follow steps A-F).
5. Click ‘OK’.
6. Restart Outlook.

Follow these steps if the add-in does not show in step 4 above.

1. Click the drop down menu at the bottom of the window and choose ‘Disabled Items’.
2. Click ‘Go’.
3. Click the ‘Microsoft Teams Meeting Add-In for Microsoft Office’ add-in.
4. Click ‘Enable’.
5. Click ‘Close’.
6. Restart Outlook.