How to propose rescheduling a meeting sent by someone else in Outlook for Mac 2011?

How to propose rescheduling a meeting sent by someone else in Outlook for
Mac 2011?

This should be easy - but there doesn't seem to be any equivalent of
'Decline and propose a new time' or even just 'Send update' for meetings
in the Mac version of Outlook.
The folks at Quora think this feature simply doesn't exist and that it's
impossible. Every help page I can find that looks relevant refers only to
Windows versions of Outlook. http://office.microsoft.com/ has help pages
titled "Change an appointment, event, or meeting", but only for the
Windows versions - for Mac, the only remotely related help page I can find
is for how to "Create a meeting or appointment".
Edit - just found an Outlook for Mac 2011 page for updating meetings, but
it refers to a "Send update" button in the "Meeting" tab that just doesn't
exist for me. Here's all I have after editing a meeting:

Surely this can't be impossible? It seems too basic and fundamental to be
a missing feature, but the only option I can find is to decline the
meeting then create a whole new meeting.



There's a post on MS Answers that suggests that updates are always sent
automatically with any change, but this seems to simply be wrong. I've
never had updates send when I change a meeting, and whenever I do save
changes to a meeting, it warns me that You have made changes to this
meeting. If the organizer sends an update, your changes will be deleted.



Details if more are needed:
Outlook 2011, Lion OS
Office network with a MS Exchange network
I'm not using MS Outlook for Mac out of choice... It's a company policy I
can't influence. So "outlook sux use sumthin else" won't help here.
Exact task is: there's a meeting that has been accepted, where the invite
was sent by someone else. I'm trying to change the meeting time in a way
that sends an update to everyone else in the meeting. I can open the
meeting and change the time, but that only changes the copy stored in my
personal calendar - it doesn't update the other people about the new time.
There are no permissions issues. My user account has permission to edit
this meeting.