You can add attendees to a to-do of the meeting type after you have created it, using the Create To-do wizard.
You can remove attendees only from the Organizer To-do card.
Open the Salesperson/Purchaser Card window.
Select the salesperson who organized the to-do you want to add attendee(s) to and click OK.
On the Salesperson/Purchaser card, click Salesperson, To-dos.
In the To-do List window, select the to-do you want to add attendee(s) to.
Click To-do, Attendee Scheduling.
Fill in the fields on the attendee card for the new attendee. For Help about a specific field, click the field and press F1.
If you want a new attendee to receive an invitation to the meeting, select the Send Invitation check box for this attendee.
Removing Attendees from a Meeting
Editing Attachments to Meeting Invitations