Microsoft Teams has a scheduling button that appears in Outlook automatically if you have both installed. This works for both in Citrix and outside of Citrix, but both applicaitons need to be installed.
In the event you don't see the button, please close both applications, open Microsoft Teams first and then Outlook and the button should be available.
1) To schedule a new Teams Meeting please select the "New Teams Meeting" button in Outlook:
2) Once selected you'll see a window appear to fill in the details. Once this is sent off users will be able to click on the link that appears in the body of the scheduler for attendees to click on: