Inviting people to meeting - Outlook

having Farhia check these articles to get the proper information for inviting people : Creating appointments and meetings in Outlook and https://uwaterloo.atlassian.net/wiki/spaces/ISTKB/pages/269156649/Modifying+Meetings+in+Outlook+2016#How-to-invite-other-people-to-a-meeting

Open the meeting from your calendar by double-clicking on it.
In the To: field, enter the email addresses of the people you'd like to invite to the meeting, separated by semi-colons. As you type, an auto-complete list will display people you've previously emailed. Click on an entry to add that person to the To: field.
If they have a UWaterloo Exchange account (faculty, staff, grad student), click the To: button. In the Global Address List, search for the people you'd like to invite to the meeting. Select their names and then click the Required or Optional button to add them to those fields. Click OK.

Update the attendee list by adding the additional person.
Click Send Update.
A new window will appear, requiring you to select between:
- Sending an update to modified attendees only
  or
- Sending an update to everyone
Make your selection and click OK.