That's pretty product-specific, and not really a question about PowerShell. Adding an appropriate Exchange tag to your question would probably get you a better answer.
I doubt that the Set-MailboxCalendarConfiguration would have that addition until either the next release of Exchange server, or maybe their next roll-up.
You might try using something like Fiddler to capture the setting of the option in OWA and then use Invoke-RestMethod to send the same data to the Exchange server.