The Meetings add-in is a custom add-in that you enable from the add-ins menu in Outlook.
To install the Meetings add-in:
Or create a new event in your calendar, and at the top click (...) More actions and then click Get Add-ins.
The Meetings add-in is included under Custom add-ins. Close the add-ins window.
Now, sign in to your account:
Scheduling a meeting in Outlook saves it to your calendar, where you can track attendee responses and update the meeting date and time, if needed.
To schedule a meeting in your Outlook calendar:
In Outlook on the web, create a new event in your calendar, and at the top click (...) More actions. Select Meetings Outlook Add-in > Schedule Meeting.
Your meeting information is added to the invitation.
Tip: Use the Scheduling Assistant to check your guests' calendars when you pick a date and time for the meeting.
When it's time to meet, start your meeting with the desktop app, mobile app, web browser, or the Meetings add-in for Outlook.
Tip: Sometimes you need to gather people into your meeting room quickly, without waiting for responses. To send a quick meeting invitation, create or reply to an email message, and then click Urgent Meeting. (On the web, click (...) More actions and then scroll down and click Meetings Outlook Add-in > Urgent Meeting.) This invitation is not saved on your calendar.
On the Home tab in Outlook, click Start My Meeting to open the task pane.
Or, in Outlook on the web, at the top of a message, click (...) More actions and then scroll down and click Meetings Outlook Add-in > Start My Meeting.
Then, under Web Meeting, select your meeting room and click Start. Your room opens and you are automatically signed in as the host.