Editing Scheduled Meetings
Start the Meeting Wizard
In the room where the meeting is scheduled, click on Invite, then See who has access…
…then in the invitation list, click the Edit icon for the meeting.
Editing the Scheduled Meeting
Adding Invitations to the Meeting
The Invitation Wizard will show a list of all the currently invited people. To add people, type in their email addresses, comma separated. Click Next.
Changing the Meeting Time
Here, you can edit the scheduled meeting time. Click Next.
In the final screen, clicking FINISH will save the scheduled meeting information and re-email everyone who was scheduled to attend.
Deleting Invitations
See here.