Outlook saves each of these unique changes as a meeting exception.
In the period of a year, a twice weekly meeting will have about 90 more occurrences than a monthly meeting during that same period.
Although you can cancel a recurring meeting, a better option is to change the end date for the series.
Always use the Remove from Calendar command to process meeting cancellations from your Inbox.
Avoid processing meetings directly from the Calendar module.
The attendees who earlier received the forwarded copy of the meeting will not receive the update.
If the above limitations prevent you from successfully and consistently forwarding meeting invitations, it is best to simply ask the meeting organizer to add the desired attendees.
When the organizer receives the meeting notification, the new attendee is added to the organizer’s meeting.
If existing attendees need to know that an additional attendee was added to the meeting, then the organizer must open the meeting and send a meeting update to all of the attendees.
Additionally, it can introduce unexpected behavior. You can always create a new meeting series when the current one ends.