If you want to share an appointment with other users you can create an .ics file and attach it to an email message. The recipient can then save the appointment to their calendar. This method works for users on the Microsoft 365 server and those who may use a different calendar/mail server.
1. Create the calendar item
2. Choose File | Save as | iCalendar format (*.ics)
3. Click Save.
4. Create a new email message and attach the file.
OR
1. Create the calendar item
2. Select the down arrow next to Forward
3. Select Forward as iCalendar
4. Address the message and click Send
1. Create the calendar event and click Save and Close
2. Go to the File menu and create a new email.
3. Click and drag the event from the calendar into a grayed-out area in the message header and it will appear as an .ics attachment.
OR
1. Create the calendar event and click Save and Close
2. Drag the event to your desktop and it will create a .ics file
3. Create a new email message and attach the file.