There are 2 different ways for you to add a recipient to the group order. 

Option 1: You may send them the group lunch link

> Navigate to Calendar
>
Go to the date of your group lunch.
> See Group Order Link:

Option 2: Add them to the group lunch contact list:

> Navigate to Calendar
>
Go to the date of your group lunch.
> Click on the Edit Lunch
> Add Guests under "Guest"

See video below for references:


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