Or the much more sensible, and MSFT way of handling it (in outlook) ExternalUser: Hello here is a calendar invite I would like you to attend, please confirm or

Or the much more sensible, and MSFT way of handling it (in outlook) ExternalUser: Hello here is a calendar invite I would like you to attend, please confirm or deny User: Thank you, now I can verify the request and choose to add this to my calendar or not