Cross Corporation Meeting requests

[Dollar]

Hi

Got a little query regarding sending meeting requests from one company to another.
The example:
Corporation A has a user who needs to invite someone from Corp B to a meeting. He sets up a standard meeting invite and sends.

The question:
Should the user in Corp B see the standard Accept/Tentative/Decline options as currently these messages appear to be delivered as standard mail messages and have regular Reply/Reply-All/Forward options.

I'm not certain whether SMTP can actually translate this or whether it's normal behaviour.

Thanks for any advice.