.
2.
In the Event Quick View popup- Click the desired event in Calendar.
- In the Event Quick View popup, there is a field called Participants.
- Click the Add link corresponding to it.
- Edit the Participants details and Click Add.
Whichever way you follow to add the participants, once you add them, you can choose to send the invitation to the event to the newly added participants.

The changes are now saved in CRM.