When organising Teams meeting on Outlook for 40 or more participants or 10 or more distribution lists, you will soon see a prompt to set meeting options.
How will this effect you and your organisation?
This update will become available when the correct version of Teams is automatically updates on your desktop/ It will not rely on an Outlook update.
This is what you can expect the ‘Set Meeting Options’ prompt to look like:

Image is not our own. Image courtesy of Microsoft, taken from New meeting options for managing large Teams meetings in Outlook for Windows email
If you, as the meeting organiser, selects the Set Options button, the Teams Meeting Options dialog will offer you options such as who can bypass the lobby and who can present:

Image is not our own. Image courtesy of Microsoft, taken from New meeting options for managing large Teams meetings in Outlook for Windows email
If you choose the ‘Not Now’ button, the meeting invitation will inherit the default Teams meeting options.
It’s worth noting that Teams meeting options can be set anytime before or even during the meeting.
When can you expect this?
Roll out is expected late January 2021