> When a meeting recipient looks at their calendar, they are able to
> move their copy of the appointment to a different time without anyone
> else involved in the meeting knowing about it.
I wonder what the motivation for doing this is. Since they didn't organize
the meeting, why would they move it?
> My questions:
> (i) Is this correct?
I think so.
> (ii) Is it documented in a knowledgebase article (or similar)?
I would think it intuitive. If it's on my calendar, it's my data and I can
do with it as I please.
> (iii) Is there a way of 'locking down' their ability to do this?
I don't think so. If it's on a person's calendar, s/he owns it. You can't
lock something away from the owner.

Signature
Brian Tillman [MVP-Outlook]