Open Calendar. By default, month view is displayed.
Double click on the date slot you want to set up the meeting. This launches ADD EVENT pop-up:
Enter title, other info, click 'Add Invitee' link to enter invitees. Start entering the email and suggestions (Only from the domain) will pop-up. Currently, we don't support outsiders.
Select the invitee from the list.
Click SAVE button and invitation will be sent to the invitees.