In the Calendar app in iOS 18 and later, you can send meeting and event invitations. iCloud, Microsoft Exchange, and some CalDAV servers also let you send meeting invitations — though not all calendar servers support every feature.)
Before you can invite people to events you’ve scheduled, you need to make sure your calendar accounts are turned on.
° Go to Settings > Apps > Calendar.
° Tap Calendar Accounts, select an account, then check to see if Calendar is turned on.
To invite others to an event:
° Launch the Calendar app.
° Tap the event, then tap Edit near the top of the screen.
° Tap Invitees.
° Do any of the following:
- Add a name from your contacts: Enter a contact’s name, tap the name, then tap Done.
You can also tap “+” to select contacts. - Add an email address: Enter an email address, tap Return, then tap Done. Note: In order to send a calendar invitation to a contact, the contact must have an email address.
- To make an invitation optional, tap Invitees, swipe left on the name or email address of the person you’ve invited, then tap Make Optional.
- Tap Done when you’re finished.
If you don’t want to be notified when someone declines a meeting, go to Settings > Apps > Calendar, then turn off Show Invitee Declines.
With Microsoft Exchange and some other exchange servers, you can invite people to an event even if you’re not the one who scheduled it.
To schedule an event without blocking your schedule:
° Launch the Calendar app.
° Tap the event, then tap Edit.
° Tap Show As, then tap Free.
To quickly email attendees:
° Launch the Calendar app.
Tap an event that has attendees.
° Tap Invitees, then tap the Mail (letter) icon.
(This how-to is based on my experiences and info on Apple’s support pages.)